Dermoscopy - Histopathology Correlation. A Conspectus in the Skin of colour

Description

Foreword Preface How to Use the Atlas? A Note from the Editors to the Readers Contents List of Contributors1 About the Editors 1: Dermoscopy: An Overview of the Principles, Procedure and Practice 1.1 Introduction 1.2 Applications of Dermoscopy 1.3 Tool and Technique 1.4 Principal Components of a Dermoscope 1.5 Principles of Dermoscopy 1.6 Types of Dermoscopy 1.6.1 Polarized and Non-polarized Dermoscopy 1.6.2 Contact and Non-contact Dermoscopy 1.6.3 Hand-held and Videodermoscopy 1.6.3.1 Real Time Dermoscopy and Dermoscopic Image Analysis 1.7 Dermoscopic Description: Structures, Morphologies, Patterns, Colors and Criteria 1.7.1 Structures, Morphologies and Patterns 1.7.2 Colors 1.7.3 Criteria 1.8 Conclusion 1.9 Keywords References 2: Melanocytic Nevus and Nevoid Disorders 2.1 Melanocytic Nevi 2.1.1 Introduction 2.1.2 Clinical Features 2.1.3 Dermoscopic Features 2.1.3.1 Globular Pattern 2.1.3.2 Reticular Pattern 2.1.3.3 Color 2.1.4 Histopathological Correlation 2.1.5 Differential Diagnosis 2.1.6 Keywords 2.2 Atypical Nevi/Clark’s Nevi/Dysplastic Nevi 2.2.1 Introduction 2.2.2 Dermoscopic Features 2.2.3 Histopathological Correlation 2.2.4 Differential Diagnosis 2.2.5 Keywords 2.3 Verrucous Epidermal Nevus 2.3.1 Introduction 2.3.2 Clinical Features 2.3.3 Dermoscopic Features 2.3.4 Histopathological Correlation 2.3.5 Differential Diagnosis 2.3.6 Keywords 2.4 Blue Nevi 2.4.1 Introduction 2.4.2 Clinical Features 2.4.3 Dermoscopic Features 2.4.4 Histopathological Correlations 2.4.5 Differential Diagnosis 2.4.6 Keywords 2.5 Combined Nevi 2.5.1 Introduction 2.5.2 Keywords 2.6 Halo Nevus 2.6.1 Introduction 2.6.2 Clinical Features 2.6.3 Dermoscopic Features 2.6.4 Histopathological Correlation 2.6.5 Differential Diagnosis 2.6.6 Keywords 2.7 Nevus Spilus 2.7.1 Introduction 2.7.2 Clinical Features 2.7.3 Dermoscopic Features 2.7.4 Histopathological Correlation 2.7.5 Differential Diagnosis 2.7.6 Keywords 2.8 Spitz Nevus 2.8.1 Introduction 2.8.2 Clinical Features 2.8.3 Dermoscopic Features 2.8.4 Histopathological Correlation 2.8.5 Differential Diagnosis 2.8.6 Keywords 2.9 Nevus of Ota 2.9.1 Introduction 2.9.2 Clinical Features 2.9.3 Dermoscopic Features 2.9.4 Histopathological Correlation 2.9.5 Differential Diagnosis 2.9.6 Keywords 2.10 Café-au-lait Macules 2.10.1 Introduction 2.10.2 Clinical Features 2.10.3 Dermoscopic Features 2.10.4 Histopathological Correlation 2.10.5 Differential Diagnosis 2.10.6 Keywords 2.11 Becker’s Nevus 2.11.1 Introduction 2.11.2 Clinical Features 2.11.3 Dermoscopic Features 2.11.4 Histopathological Correlation 2.11.5 Differential Diagnosis 2.11.6 Keywords 2.12 Nevus Comedonicus 2.12.1 Introduction 2.12.2 Clinical Features 2.12.3 Dermoscopic Features 2.12.4 Histopathological Correlation 2.12.5 Differential Diagnosis 2.12.6 Keywords 2.13 Nevus Sebaceous of Jadassohn 2.13.1 Introduction 2.13.2 Clinical Features 2.13.3 Dermoscopic Features 2.13.4 Histopathological Correlation 2.13.5 Differential Diagnosis 2.13.6 Keywords References 3: Inflammatory Dermatoses 3.1 General Considerations 3.1.1 Introduction 3.1.2 Clinical Features 3.1.3 Histopathology 3.1.4 Dermoscopy 3.2 Specific Characteristics 3.2.1 Eczema 3.2.1.1 Introduction 3.2.1.2 Clinical Features 3.2.1.3 Dermoscopic Features 3.2.1.4 Histopathological Correlation 3.2.1.5 Differential Diagnosis 3.2.1.6 Keywords 3.2.2 Follicular Eczema 3.2.2.1 Introduction 3.2.2.2 Clinical Features 3.2.2.3 Dermoscopic Features 3.2.2.4 Histopathologic Correlation 3.2.2.5 Differential Diagnosis 3.2.2.6 Keywords 3.2.3 Lichen Nitidus 3.2.3.1 Introduction 3.2.3.2 Clinical Features 3.2.3.3 Dermoscopic Features 3.2.3.4 Histopathologic Correlation 3.2.3.5 Differential Diagnosis 3.2.3.6 Keywords 3.2.4 Lichen Planus 3.2.4.1 Introduction 3.2.4.2 Clinical Features 3.2.4.3 Dermoscopic Features 3.2.4.4 Histopathological Correlation 3.2.4.5 Differential Diagnosis 3.2.4.6 Keywords 3.2.5 Lichen Simplex Chronicus 3.2.5.1 Introduction 3.2.5.2 Clinical Features 3.2.5.3 Dermoscopic Features 3.2.5.4 Histopathological Correlation 3.2.5.5 Differential Diagnosis 3.2.5.6 Keywords 3.2.6 Lichen Spinulosus 3.2.6.1 Introduction 3.2.6.2 Clinical Features 3.2.6.3 Dermoscopic Features 3.2.6.4 Histopathologic Correlation 3.2.6.5 Differential Diagnosis 3.2.6.6 Keywords 3.2.7 Pityriasis Lichenoides Chronica 3.2.7.1 Introduction 3.2.7.2 Clinical Features 3.2.7.3 Dermoscopic Features 3.2.7.4 Histopathologic Correlation 3.2.7.5 Differential Diagnosis 3.2.7.6 Keywords 3.2.8 Pityriasis Lichenoides et Varioliformis Acuta (PLEVA) 3.2.8.1 Introduction 3.2.8.2 Clinical Features 3.2.8.3 Dermoscopic Features 3.2.8.4 Histopathological Correlation 3.2.8.5 Differential Diagnosis 3.2.8.6 Keywords 3.2.9 Prurigo Nodularis 3.2.9.1 Introduction 3.2.9.2 Clinical Features 3.2.9.3 Dermoscopic Features 3.2.9.4 Histopathological Correlation 3.2.9.5 Differential Diagnosis 3.2.9.6 Keywords 3.2.10 Pityriasis Rosea 3.2.10.1 Introduction 3.2.10.2 Clinical Features 3.2.10.3 Dermoscopic Features 3.2.10.4 Histopathological Correlation 3.2.10.5 Differential Diagnosis 3.2.10.6 Keywords 3.2.11 Pityriasis Rubra Pilaris 3.2.11.1 Introduction 3.2.11.2 Clinical Features 3.2.11.3 Dermoscopy 3.2.11.4 Histopathologic Correlation 3.2.11.5 Differential Diagnosis 3.2.11.6 Keywords 3.2.12 Psoriasis 3.2.12.1 Introduction 3.2.12.2 Clinical Features 3.2.12.3 Dermoscopic Features 3.2.12.4 Histopathological Correlation 3.2.12.5 Differential Diagnosis 3.2.12.6 Keywords 3.2.13 Seborrheic Dermatitis 3.2.13.1 Introduction 3.2.13.2 Clinical Features 3.2.13.3 Dermoscopic Features 3.2.13.4 Histopathologic Correlation 3.2.13.5 Differential Diagnosis 3.2.13.6 Keywords References 4: Granulomatous Diseases 4.1 Annular Elastolytic Giant Cell Granuloma 4.1.1 Introduction 4.1.2 Clinical Features 4.1.3 Dermoscopic Features 4.1.4 Histopathological Correlation 4.1.5 Differential Diagnosis 4.1.6 Keywords 4.2 Chromoblastomycosis 4.2.1 Introduction 4.2.2 Clinical Features 4.2.3 Dermoscopic Features 4.2.4 Histopathological Correlation 4.2.5 Differential Diagnosis 4.2.6 Keywords 4.3 Cutaneous Leishmaniasis 4.3.1 Introduction 4.3.2 Clinical Features 4.3.3 Dermoscopic Features 4.3.4 Histopathological Correlation 4.3.5 Differential Diagnosis 4.3.6 Keywords 4.4 Granuloma Annulare 4.4.1 Introduction 4.4.2 Clinical Features 4.4.3 Dermoscopic Features 4.4.4 Histopathological Correlation 4.4.5 Differential Diagnosis 4.4.6 Keywords 4.5 Leprosy 4.5.1 Introduction 4.5.2 Clinical Features 4.5.3 Dermoscopic Features 4.5.4 Histopathological Correlation 4.5.5 Differential Diagnosis 4.5.6 Keywords 4.6 Lupus Vulgaris 4.6.1 Introduction 4.6.2 Clinical Features 4.6.3 Dermoscopic Features 4.6.4 Histopathological Correlation 4.6.5 Differential Diagnosis 4.6.6 Keywords 4.7 Mycetoma 4.7.1 Introduction 4.7.2 Clinical Features 4.7.3 Dermoscopic Features 4.7.4 Histopathological Correlation 4.7.5 Differential Diagnosis 4.7.6 Keywords 4.8 Necrobiosis Lipoidica Diabeticorum 4.8.1 Introduction 4.8.2 Clinical Features 4.8.3 Dermoscopic Features 4.8.4 Histopathological Correlation 4.8.5 Differential Diagnosis 4.8.6 Keywords 4.9 Palisading Neutrophilic and Granulomatous Dermatitis 4.9.1 Introduction 4.9.2 Clinical Features 4.9.3 Dermoscopic Features 4.9.4 Histopathological Correlation 4.9.5 Differential Diagnosis 4.9.6 Keywords 4.10 Sarcoidosis 4.10.1 Introduction 4.10.2 Clinical Features 4.10.3 Dermoscopic Features 4.10.4 Histopathological Correlation 4.10.5 Differential Diagnosis 4.10.6 Keywords 4.11 Sporotrichosis 4.11.1 Introduction 4.11.2 Clinical Features 4.11.3 Dermoscopic Features 4.11.4 Histopathological Correlation 4.11.5 Differential Diagnosis 4.11.6 Keywords 4.12 Foreign Body Granuloma 4.12.1 Introduction 4.12.2 Clinical Features 4.12.3 Dermoscopic Features 4.12.4 Histopathological Correlation 4.12.5 Differential Diagnosis 4.12.6 Keywords 4.13 Xanthogranulomatous Diseases 4.13.1 Introduction 4.13.2 Clinical Features 4.13.3 Dermoscopic Features 4.13.4 Histopathological Correlation 4.13.5 Differential Diagnosis 4.13.6 Keywords References 5: Hypopigmentary Disorders 5.1 Discoid Lupus Erythematosus 5.1.1 Introduction 5.1.2 Clinical Features 5.1.3 Dermoscopic Features 5.1.4 Histopathological Correlation 5.1.5 Differential Diagnosis 5.1.6 Keywords 5.2 Hypopigmented Mycosis Fungoides 5.2.1 Introduction 5.2.2 Clinical Features 5.2.3 Dermoscopic Features 5.2.4 Histopathological Correlation 5.2.5 Differential Diagnosis 5.2.6 Keywords 5.3 Idiopathic Guttate Hypomelanosis 5.3.1 Introduction 5.3.2 Clinical Features 5.3.3 Dermoscopic Features 5.3.4 Histopathological Correlation 5.3.5 Differential Diagnosis 5.3.6 Keywords 5.4 Leprosy 5.4.1 Introduction 5.4.2 Clinical Features 5.4.3 Dermoscopic Features 5.4.4 Histopathological Correlation 5.4.5 Differential Diagnosis 5.4.6 Keywords 5.5 Hypopigmented Lichen Striatus 5.5.1 Introduction 5.5.2 Clinical Features 5.5.3 Dermoscopic Features 5.5.4 Histopathological Correlation 5.5.5 Differential Diagnosis 5.5.6 Keywords 5.6 Lichen sclerosus et atrophicus 5.6.1 Introduction 5.6.2 Clinical Features 5.6.3 Dermoscopic Features 5.6.4 Histopathological Correlation 5.6.5 Differential Diagnosis 5.6.6 Keywords 5.7 Nevus Depigmentosus 5.7.1 Introduction 5.7.2 Clinical Features 5.7.3 Dermoscopic Features 5.7.4 Histopathological Correlation 5.7.5 Differential Diagnosis 5.7.6 Keywords 5.8 Pityriasis Alba 5.8.1 Introduction 5.8.2 Clinical Features 5.8.3 Dermoscopy 5.8.4 Histopathological Correlation 5.8.5 Differential Diagnosis 5.8.6 Keywords 5.9 Post Inflammatory Hypopigmentation 5.9.1 Introduction 5.9.2 Clinical Features 5.9.3 Dermoscopy 5.9.4 Histopathological Correlation 5.9.5 Differential Diagnosis 5.9.6 Keywords 5.10 Progressive Macular Hypomelanosis 5.10.1 Introduction 5.10.2 Clinical Features 5.10.3 Dermoscopy 5.10.4 Histopathological Correlation 5.10.5 Differential Diagnosis 5.10.6 Keywords 5.11 Hypopigmented Pityriasis Versicolor 5.11.1 Introduction 5.11.2 Clinical Features 5.11.3 Dermoscopic Features 5.11.4 Histopathological Correlation 5.11.5 Differential Diagnosis 5.11.6 Keywords 5.12 Vitiligo 5.12.1 Introduction 5.12.2 Clinical Features 5.12.3 Dermoscopic Features 5.12.4 Histopathological Correlation 5.12.5 Differential Diagnosis 5.12.6 Keywords References 6: Hyperpigmentary Disorders 6.1 Lichen Planus Pigmentosus 6.1.1 Introduction 6.1.2 Clinical Features 6.1.3 Dermoscopic Features 6.1.4 Histopathological Correlation 6.1.5 Differential Diagnosis 6.1.6 Keywords 6.2 Erythema Dyschromicum Perstans 6.2.1 Introduction 6.2.2 Clinical Features 6.2.3 Dermoscopic Features 6.2.4 Histopathological Correlation 6.2.5 Differential Diagnosis 6.2.6 Keywords 6.3 Frictional Melanosis 6.3.1 Introduction 6.3.2 Clinical Features 6.3.3 Dermoscopic Features 6.3.4 Histopathological Correlation 6.3.5 Differential Diagnosis 6.3.6 Keywords 6.4 Seborrheic Melanosis 6.4.1 Introduction 6.4.2 Clinical Features 6.4.3 Dermoscopic Features 6.4.4 Histopathological Correlation 6.4.5 Differential Diagnosis 6.4.6 Keywords 6.5 Pigmented Contact Dermatitis 6.5.1 Introduction 6.5.2 Clinical Features 6.5.3 Dermoscopic Features 6.5.4 Histopathological Correlation 6.5.5 Differential Diagnosis 6.5.6 Keywords 6.6 Fixed Drug Eruption 6.6.1 Introduction 6.6.2 Clinical Features 6.6.3 Dermoscopic Features 6.6.4 Histopathological Correlation 6.6.5 Differential Diagnosis 6.6.6 Keywords 6.7 Acanthosis Nigricans 6.7.1 Introduction 6.7.2 Clinical Features 6.7.3 Dermoscopic Features 6.7.4 Histopathological Correlation 6.7.5 Differential Diagnosis 6.7.6 Keywords 6.8 Melasma 6.8.1 Introduction 6.8.2 Clinical Features 6.8.3 Dermoscopic Features 6.8.4 Histopathological Correlation 6.8.5 Differential Diagnosis 6.8.6 Keywords 6.9 Exogenous Ochronosis 6.9.1 Introduction 6.9.2 Clinical Features 6.9.3 Dermoscopic Features 6.9.4 Histopathological Correlation 6.9.5 Differential Diagnosis 6.9.6 Keywords 6.10 Pigmentary Demarcation Lines 6.10.1 Introduction 6.10.2 Clinical Features 6.10.3 Dermoscopic Features 6.10.4 Histopathological Correlation 6.10.5 Differential Diagnosis 6.10.6 Keywords 6.11 Post-inflammatory Hyperpigmentation 6.11.1 Introduction 6.11.2 Clinical Features 6.11.3 Dermoscopic Features 6.11.4 Histopathological Correlation 6.11.5 Differential Diagnosis 6.11.6 Keywords 6.12 Confluent Reticulated Papillomatosis 6.12.1 Introduction 6.12.2 Clinical Features 6.12.3 Dermoscopic Features 6.12.4 Histopathological Correlation 6.12.5 Differential Diagnosis 6.12.6 Keywords 6.13 Hyperpigmented Pityriasis Versicolor 6.13.1 Introduction 6.13.2 Clinical Features 6.13.3 Dermoscopic Features 6.13.4 Histopathological Correlation 6.13.5 Differential Diagnosis 6.13.6 Keywords 6.14 Primary Cutaneous Amyloidosis 6.14.1 Introduction 6.14.2 Clinical Features 6.14.3 Dermoscopic Features 6.14.4 Histopathological Correlation 6.14.5 Differential Diagnosis 6.14.6 Keywords 6.15 Terra Forma-Firme Dermatosis 6.15.1 Introduction 6.15.2 Clinical Features 6.15.3 Dermoscopic Features 6.15.4 Histopathological Correlation 6.15.5 Differential Diagnosis 6.15.6 Keywords 6.16 Dermatitis Neglecta 6.16.1 Introduction 6.16.2 Clinical Features 6.16.3 Dermoscopic Features 6.16.4 Histopathological Correlation 6.16.5 Differential Diagnosis 6.16.6 Keywords References 7: Vascular Diseases 7.1 Infantile Hemangioma 7.1.1 Introduction 7.1.2 Clinical Features 7.1.3 Dermoscopic Features 7.1.4 Histopathological Correlation 7.1.5 Differential Diagnosis 7.1.6 Keywords 7.2 Port Wine Stain 7.2.1 Introduction 7.2.2 Clinical Features 7.2.3 Dermoscopic Features 7.2.4 Histopathological Correlation 7.2.5 Differential Diagnosis 7.2.6 Keywords 7.3 Pyogenic Granuloma 7.3.1 Introduction 7.3.2 Clinical Features 7.3.3 Dermoscopic Features 7.3.4 Histopathological Correlation 7.3.5 Differential Diagnosis 7.3.6 Keywords 7.4 Angioma Serpiginosum 7.4.1 Introduction 7.4.2 Clinical Features 7.4.3 Dermoscopic Features 7.4.4 Histopathological Correlation 7.4.5 Differential Diagnosis 7.4.6 Keywords 7.5 Venous Lakes 7.5.1 Introduction 7.5.2 Clinical Features 7.5.3 Dermoscopic Features 7.5.4 Histopathological Correlation 7.5.5 Differential Diagnosis 7.5.6 Keywords 7.6 Erythema Multiforme 7.6.1 Introduction 7.6.2 Clinical Features 7.6.3 Dermoscopic Features 7.6.4 Histopathological Correlation 7.6.5 Differential Diagnosis 7.6.6 Keywords 7.7 Viral Exanthematous Rash 7.7.1 Introduction 7.7.2 Clinical Features 7.7.3 Dermoscopic Features 7.7.4 Histopathological Correlation 7.7.5 Differential Diagnosis 7.7.6 Keywords 7.8 Drug Rash (Maculopapular) 7.8.1 Introduction 7.8.2 Clinical Features 7.8.3 Dermoscopic Features 7.8.4 Histopathological Correlation 7.8.5 Differential Diagnosis 7.8.6 Keywords 7.9 Rosacea 7.9.1 Introduction 7.9.2 Clinical Features 7.9.3 Dermoscopic Features 7.9.4 Histopathological Correlation 7.9.5 Differential Diagnosis 7.9.6 Keywords 7.10 Urticaria and Urticarial Vasculitis 7.10.1 Introduction 7.10.2 Clinical Features 7.10.3 Dermoscopic Features 7.10.4 Histopathological Correlation 7.10.5 Differential Diagnosis 7.10.6 Keywords References 8: Benign Tumors 8.1 Angiokeratoma 8.1.1 Introduction 8.1.2 Clinical Features 8.1.3 Dermoscopic Features 8.1.4 Histopathological Correlation 8.1.5 Differential Diagnosis 8.1.6 Keywords 8.2 Calcinosis Cutis 8.2.1 Introduction 8.2.2 Clinical Features 8.2.3 Dermoscopic Features 8.2.4 Histopathological Correlation 8.2.5 Differential Diagnosis 8.2.6 Keywords 8.3 Cherry Angioma 8.3.1 Introduction 8.3.2 Clinical Features 8.3.3 Dermoscopic Features 8.3.4 Histopathological Features 8.3.5 Differential Diagnosis 8.3.6 Keywords 8.4 Dermatofibroma 8.4.1 Introduction 8.4.2 Clinical Features 8.4.3 Dermoscopic Feature 8.4.4 Histopathological Correlation 8.4.5 Differential Diagnosis 8.4.6 Keywords 8.5 Dermatosis Papulosa Nigra 8.5.1 Introduction 8.5.2 Clinical Features 8.5.3 Dermoscopic Features 8.5.4 Histopathological Correlation 8.5.5 Differential Diagnosis 8.5.6 Keywords 8.6 Eccrine Poroma 8.6.1 Introduction 8.6.2 Clinical Features 8.6.3 Dermoscopic Features 8.6.4 Histopathological Correlation 8.6.5 Differential Diagnosis 8.6.6 Keywords 8.7 Epidermal Cyst 8.7.1 Introduction 8.7.2 Clinical Features 8.7.3 Dermoscopic Features 8.7.4 Histopathological Correlation 8.7.5 Differential Diagnosis 8.7.6 Keywords 8.8 Fibrokeratoma 8.8.1 Introduction 8.8.2 Clinical Features 8.8.3 Dermoscopic Features 8.8.4 Histopathological Correlation 8.8.5 Differential Diagnosis 8.8.6 Keywords 8.9 Fordyce Spots 8.9.1 Introduction 8.9.2 Clinical Features 8.9.3 Dermoscopic Features 8.9.4 Histopathological Correlation 8.9.5 Differential Diagnosis 8.9.6 Keywords 8.10 Apocrine Hidrocystoma 8.10.1 Introduction 8.10.2 Clinical Features 8.10.3 Dermoscopic Features 8.10.4 Histopathological Correlation 8.10.5 Differential Diagnosis 8.10.6 Keywords 8.11 Lymphangioma Circumscriptum 8.11.1 Introduction 8.11.2 Clinical Features 8.11.3 Dermoscopic Features 8.11.4 Histopathological Correlation 8.11.5 Differential Diagnosis 8.11.6 Keywords 8.12 Neurofibroma 8.12.1 Introduction 8.12.2 Clinical Features 8.12.3 Dermoscopic Features 8.12.4 Histopathological Correlation 8.12.5 Differential Diagnosis 8.12.6 Keywords 8.13 Pilomatricoma 8.13.1 Introduction 8.13.2 Clinical Features 8.13.3 Dermoscopic Features 8.13.4 Histopathological Correlation 8.13.5 Differential Diagnosis 8.13.6 Keywords 8.14 Sebaceous Hyperplasia 8.14.1 Introduction 8.14.2 Clinical Features 8.14.3 Dermoscopic Features 8.14.4 Histopathological Correlation 8.14.5 Differential Diagnosis 8.14.6 Keywords 8.15 Seborrheic Keratosis 8.15.1 Introduction 8.15.2 Clinical Features 8.15.3 Dermoscopic Features 8.15.4 Histopathological Correlation 8.15.5 Differential Diagnosis 8.15.6 Keywords 8.16 Stucco Keratosis 8.16.1 Introduction 8.16.2 Clinical Features 8.16.3 Dermoscopic Features 8.16.4 Histopathological Correlation 8.16.5 Differential Diagnosis 8.16.6 Keywords 8.17 Syringoma 8.17.1 Introduction 8.17.2 Clinical Features 8.17.3 Dermoscopic Features 8.17.4 Histopathological Correlation 8.17.5 Differential Diagnosis 8.17.6 Keywords 8.18 Trichoepithelioma 8.18.1 Introduction 8.18.2 Clinical Features 8.18.3 Dermoscopic Features 8.18.4 Histopathological Correlation 8.18.5 Differential Diagnosis 8.18.6 Keywords 8.19 Xanthoma 8.19.1 Introduction 8.19.2 Clinical Features 8.19.3 Dermoscopic Features 8.19.4 Histopathological Correlation 8.19.5 Differential Diagnosis 8.19.6 Keywords References 9: Premalignant and Malignant Tumors 9.1 Actinic Keratosis 9.1.1 Introduction 9.1.2 Clinical Features 9.1.3 Dermoscopic Features 9.1.4 Histopathological Correlation 9.1.5 Differential Diagnosis 9.1.6 Keywords 9.2 Bowen’s Disease 9.2.1 Introduction 9.2.2 Clinical Features 9.2.3 Dermoscopic Features 9.2.4 Histopathological Correlation 9.2.5 Differential Diagnosis 9.2.6 Keywords 9.3 Cutaneous Horn 9.3.1 Introduction 9.3.2 Clinical Features 9.3.3 Dermoscopic Features 9.3.4 Histopathological Correlation 9.3.5 Differential Diagnosis 9.3.6 Keywords 9.4 Basal Cell Carcinoma 9.4.1 Introduction 9.4.2 Clinical Features 9.4.3 Dermoscopic Features 9.4.4 Histopathological Correlation 9.4.5 Differential Diagnosis 9.4.6 Keywords 9.5 Squamous Cell Carcinoma 9.5.1 Introduction 9.5.2 Clinical Features 9.5.3 Dermoscopic Features 9.5.4 Histopathological Correlation 9.5.5 Differential Diagnosis 9.5.6 Keywords 9.6 Keratoacanthoma 9.6.1 Introduction 9.6.2 Clinical Features 9.6.3 Dermoscopic Features 9.6.4 Histopathological Correlation 9.6.5 Differential Diagnosis 9.6.6 Keywords 9.7 Merkel Cell Carcinoma 9.7.1 Introduction 9.7.2 Clinical Features 9.7.3 Dermoscopic Features 9.7.4 Histopathological Correlation 9.7.5 Differential Diagnosis 9.7.6 Keywords 9.8 Mammary and Extramammary Paget’s Disease 9.8.1 Introduction 9.8.2 Clinical Features 9.8.3 Dermoscopic Features 9.8.4 Histopathological Correlation 9.8.5 Differential Diagnosis 9.8.6 Keywords 9.9 Nodular Melanoma 9.9.1 Introduction and Clinical Features 9.9.2 Dermoscopic Features 9.9.3 Keywords 9.10 Acral Melanoma (Palmoplantar and Subungual) 9.10.1 Palmoplantar Melanoma 9.10.1.1 Clinical Features 9.10.1.2 Dermoscopic Features 9.10.1.3 Histopathological Correlation 9.10.1.4 Keywords 9.10.2 Subungual Melanoma 9.10.2.1 Keywords 9.11 Dermoscopy of Melanoma Skin Cancers: Amelanotic Melanoma 9.11.1 Introduction 9.11.2 Clinical Features 9.11.3 Dermoscopic Features 9.11.4 Histopathological Correlation 9.11.5 Differential Diagnosis 9.11.6 Keywords 9.12 Dermoscopy of Melanoma Skin Cancers: Superficial Spreading Melanoma 9.12.1 Introduction 9.12.2 Clinical Features 9.12.3 Dermoscopic Features 9.12.4 Histopathological Correlation 9.12.5 Differential Diagnosis 9.12.6 Keywords References 10: Infective Diseases 10.1 Tinea Corporis 10.1.1 Introduction 10.1.2 Clinical Features 10.1.3 Dermoscopic Features 10.1.4 Histopathological Correlation 10.1.5 Differential Diagnosis 10.1.6 Key Words 10.2 Tinea Incognito 10.2.1 Introduction 10.2.2 Clinical Features 10.2.3 Dermoscopic Features 10.2.4 Histopathological Correlation 10.2.5 Differential Diagnosis 10.2.6 Key Words 10.3 Acute Paronychia 10.3.1 Introduction 10.3.2 Clinical Features 10.3.3 Dermoscopic Features 10.3.4 Histopathological Correlation 10.3.5 Differential Diagnosis 10.3.6 Key Words 10.4 Majocchi’s Granuloma 10.4.1 Introduction 10.4.2 Clinical Features 10.4.3 Dermoscopic Features 10.4.4 Histopathological Correlation 10.4.5 Differential Diagnosis 10.4.6 Key Words 10.5 Onychomycosis 10.5.1 Introduction 10.5.2 Clinical Features 10.5.3 Dermoscopic Features 10.5.4 Histopathological Correlation 10.5.5 Differential Diagnosis 10.5.6 Keywords 10.6 Candidiasis 10.6.1 Introduction 10.6.2 Clinical Features 10.6.3 Dermoscopic Features 10.6.4 Histopathological Correlation 10.6.5 Differential Diagnosis 10.6.6 Key Words 10.7 Demodex Folliculitis 10.7.1 Introduction 10.7.2 Clinical Features 10.7.3 Dermoscopic Features 10.7.4 Histopathological Correlation 10.7.5 Differential Diagnosis 10.7.6 Key Words 10.8 Cutaneous Larva Migrans 10.8.1 Introduction 10.8.2 Clinical Features 10.8.3 Dermoscopic Features 10.8.4 Histopathological Correlation 10.8.5 Differential Diagnosis 10.8.6 Key Words 10.9 Scabies 10.9.1 Introduction 10.9.2 Clinical Features 10.9.3 Dermoscopic Features 10.9.4 Histopathological Correlations 10.9.5 Differential Diagnosis 10.9.6 Key Words 10.10 Pthirus Pubis 10.10.1 Introduction 10.10.2 Clinical Features 10.10.3 Dermoscopic Features 10.10.4 Histopathological Correlations 10.10.5 Differential Diagnosis 10.10.6 Key Words 10.11 Rickettsial Exanthem 10.11.1 Introduction 10.11.2 Clinical Features 10.11.3 Dermoscopic Features 10.11.4 Histopathological Correlation 10.11.5 Differential Diagnosis 10.11.6 Key Words 10.12 Herpes Labialis 10.12.1 Introduction 10.12.2 Clinical Features 10.12.3 Dermoscopic Features 10.12.4 Histopathological Correlation 10.12.5 Differential Diagnosis 10.12.6 Key Words 10.13 Herpes Zoster 10.13.1 Introduction 10.13.2 Clinical Features 10.13.3 Dermoscopic Features 10.13.4 Histopathological Correlation 10.13.5 Differential Diagnosis 10.13.6 Key Words 10.14 Molluscum Contagiosum 10.14.1 Introduction 10.14.2 Clinical Features 10.14.3 Dermoscopic Features 10.14.4 Histopathological Correlation 10.14.5 Differential Diagnosis 10.14.6 Key Words 10.15 Chicken Pox 10.15.1 Introduction 10.15.2 Clinical Features 10.15.3 Dermoscopic Features 10.15.4 Histopathological Correlation 10.15.5 Differential Diagnosis 10.15.6 Key Words 10.16 Warts 10.16.1 Introduction 10.16.2 Clinical Features 10.16.3 Dermoscopic Features 10.16.4 Histopathological Correlation 10.16.5 Differential Diagnosis 10.16.6 Key Words 10.17 Hand Foot Mouth Disease 10.17.1 Introduction 10.17.2 Clinical Features 10.17.3 Dermoscopic Features 10.17.4 Histopathological Correlation 10.17.5 Differentials Diagnosis 10.17.6 Key Words 10.18 Actinomycosis 10.18.1 Introduction 10.18.2 Clinical Features 10.18.3 Dermoscopic Features 10.18.4 Histopathological Correlation 10.18.5 Differential Diagnosis 10.18.6 Key Words 10.19 Ecthyma and Ecthyma Gangrenosum 10.19.1 Introduction 10.19.2 Clinical Features 10.19.3 Dermoscopic Features 10.19.4 Histopathological Correlation 10.19.5 Differential Diagnosis 10.19.6 Key Words 10.20 Leprosy 10.20.1 Introduction 10.20.2 Clinical Features 10.20.3 Dermoscopy Features 10.20.4 Histopathology 10.20.5 Differential Diagnosis 10.20.6 Key Words References 11: Onychoscopy 11.1 Indications of Onychoscopy 11.2 Pigmentary Onychopathies 11.2.1 Melanonychia 11.2.1.1 Introduction 11.2.1.2 Clinical Features 11.2.1.3 Dermoscopic Features 11.2.1.4 Histopathological Correlation and Differential Diagnosis 11.2.2 Leukonychia 11.2.3 Erythronychia 11.2.4 Key Words 11.3 Inflammatory Onychopathies 11.3.1 Nail Psoriasis 11.3.1.1 Introduction 11.3.1.2 Clinical Features 11.3.1.3 Dermoscopic Features 11.3.1.4 Histopathological Correlation 11.3.1.5 Differential Diagnosis 11.3.1.6 Key Words 11.3.2 Nail Lichen Planus 11.3.2.1 Introduction 11.3.2.2 Clinical Features 11.3.2.3 Dermoscopic Features 11.3.2.4 Histopathological Correlation 11.3.2.5 Differential Diagnosis 11.3.2.6 Key Words 11.3.3 Nail Lichen Striatus 11.3.3.1 Introduction 11.3.3.2 Clinical Features 11.3.3.3 Dermoscopic Features 11.3.3.4 Histopathological Correlation 11.3.3.5 Differential Diagnosis 11.3.3.6 Key Words 11.4 Infectious Onychopathies 11.4.1 Onychomycosis 11.4.1.1 Introduction 11.4.1.2 Clinical Features 11.4.1.3 Dermoscopic Features 11.4.1.4 Histopathological Correlation 11.4.1.5 Differential Diagnosis 11.4.1.6 Key Words 11.4.2 Periungual Warts 11.4.2.1 Introduction 11.4.2.2 Clinical Features 11.4.2.3 Dermoscopic Features 11.4.2.4 Histopathological Correlation 11.4.2.5 Differential Diagnosis 11.4.2.6 Key Words 11.4.3 Pseudomonas Infection 11.4.3.1 Introduction 11.4.3.2 Clinical Features 11.4.3.3 Dermoscopic Features 11.4.3.4 Histopathological Correlation 11.4.3.5 Differential Diagnosis 11.4.3.6 Key Words 11.5 Nail Tumors 11.5.1 Glomus Tumor 11.5.1.1 Introduction 11.5.1.2 Clinical Features 11.5.1.3 Dermoscopic Features 11.5.1.4 Histopathological Correlation 11.5.1.5 Differential Diagnosis 11.5.1.6 Key Words 11.5.2 Onychomatricoma 11.5.2.1 Introduction 11.5.2.2 Clinical Features 11.5.2.3 Dermoscopic Features 11.5.2.4 Histopathological Correlation 11.5.2.5 Differential Diagnosis 11.5.2.6 Key Words 11.5.3 Onychopapilloma 11.5.3.1 Introduction 11.5.3.2 Clinical Features 11.5.3.3 Dermoscopic Features 11.5.3.4 Histopathological Correlation 11.5.3.5 Differential Diagnosis 11.5.3.6 Key Words 11.5.4 Digital Myxoid Cyst 11.5.4.1 Introduction 11.5.4.2 Clinical Features 11.5.4.3 Dermoscopic Features 11.5.4.4 Histopathological Correlation 11.5.4.5 Differential Diagnosis 11.5.4.6 Key Word 11.5.5 Digital Fibrokeratoma 11.5.5.1 Introduction 11.5.5.2 Clinical Features 11.5.5.3 Dermoscopic Features 11.5.5.4 Histopathological Correlation 11.5.5.5 Differential Diagnosis 11.5.5.6 Key Words 11.5.6 Periungual Bowen’s Disease 11.5.6.1 Introduction 11.5.6.2 Clinical Features 11.5.6.3 Dermoscopic Features 11.5.6.4 Histopathological Correlation 11.5.6.5 Differential Diagnosis 11.5.6.6 Key Words 11.6 Nail Fold Capillaroscopy 11.6.1 Introduction 11.6.2 Raynaud’s Phenomenon 11.6.2.1 Introduction 11.6.2.2 Clinical Features 11.6.2.3 Dermoscopic Features 11.6.3 Systemic Sclerosis 11.6.3.1 Introduction 11.6.3.2 Clinical Features 11.6.3.3 Dermoscopic Features 11.6.4 Dermatomyositis 11.6.4.1 Introduction 11.6.4.2 Clinical Features 11.6.4.3 Dermoscopic Features 11.6.5 Systemic Lupus Erythematosus 11.6.5.1 Introduction 11.6.5.2 Clinical Features 11.6.5.3 Dermoscopic Features 11.6.5.4 Key Words 11.7 Summary References 12: Trichoscopy 12.1 Normal Scalp 12.2 Non-scarring Alopecia 12.2.1 Androgenetic Alopecia 12.2.1.1 Introduction 12.2.1.2 Clinical Features 12.2.1.3 Trichoscopic Features 12.2.1.4 Histopathological Correlation 12.2.1.5 Differential Diagnosis 12.2.1.6 Key Words 12.2.2 Tinea Capitis 12.2.2.1 Introduction 12.2.2.2 Clinical Features 12.2.2.3 Trichoscopic Features 12.2.2.4 Histopathological Correlation 12.2.2.5 Differential Diagnosis 12.2.2.6 Key Words 12.2.3 Alopecia Areata 12.2.3.1 Introduction 12.2.3.2 Clinical Features 12.2.3.3 Trichoscopic Features 12.2.3.4 Histopathological Correlation 12.2.3.5 Differential Diagnosis 12.2.3.6 Key Words 12.2.4 Congenital Triangular Alopecia 12.2.4.1 Introduction 12.2.4.2 Clinical Features 12.2.4.3 Trichoscopic Features 12.2.4.4 Histopathological Correlation 12.2.4.5 Differential Diagnosis 12.2.4.6 Key Words 12.2.5 Scalp Dysesthesia 12.2.5.1 Introduction 12.2.5.2 Clinical Features 12.2.5.3 Trichoscopic Features 12.2.5.4 Histopathological Correlation 12.2.5.5 Differential Diagnosis 12.2.5.6 Key Words 12.2.6 Trichotillomania 12.2.6.1 Introduction 12.2.6.2 Clinical Features 12.2.6.3 Trichoscopic Features 12.2.6.4 Histopathological Correlation 12.2.6.5 Differential Diagnosis 12.2.6.6 Key Words 12.3 Cicatricial Alopecia 12.3.1 Discoid Lupus Erythematosus 12.3.1.1 Introduction 12.3.1.2 Clinical Features 12.3.1.3 Trichoscopic Features 12.3.1.4 Histopathological Correlation 12.3.1.5 Differential Diagnosis 12.3.1.6 Key Words 12.3.2 Lichen Planopilaris 12.3.2.1 Introduction 12.3.2.2 Clinical Features 12.3.2.3 Trichoscopic Features 12.3.2.4 Histopathological Correlation 12.3.2.5 Differential Diagnosis 12.3.2.6 Key Words 12.3.3 Pseudopelade of Brocq 12.3.3.1 Introduction 12.3.3.2 Clinical Features 12.3.3.3 Trichoscopic Features 12.3.3.4 Histopathological Correlation 12.3.3.5 Differential Diagnosis 12.3.3.6 Key Words 12.3.4 Frontal Fibrosing Alopecia 12.3.4.1 Introduction 12.3.4.2 Clinical Features 12.3.4.3 Trichoscopic Features 12.3.4.4 Histopathological Correlation 12.3.4.5 Differential Diagnosis 12.3.4.6 Key Words 12.3.5 Folliculitis Decalvans 12.3.5.1 Introduction 12.3.5.2 Clinical Features 12.3.5.3 Trichoscopic Features 12.3.5.4 Histopathological Correlation 12.3.5.5 Differential Diagnosis 12.3.5.6 Key Words 12.3.6 Dissecting Cellulitis of the Scalp 12.3.6.1 Introduction 12.3.6.2 Clinical Features 12.3.6.3 Trichoscopic Features 12.3.6.4 Histopathological Correlation 12.3.6.5 Differential Diagnosis 12.3.6.6 Key Words 12.4 Miscellaneous Hair Disorders 12.4.1 Aplasia Cutis Congenita 12.4.1.1 Introduction 12.4.1.2 Clinical Features 12.4.1.3 Trichoscopic Features 12.4.1.4 Histopathological Correlation 12.4.1.5 Differential Diagnosis 12.4.1.6 Key Words 12.4.2 Monilethrix 12.4.2.1 Introduction 12.4.2.2 Clinical Features 12.4.2.3 Trichoscopic Features 12.4.2.4 Histopathological Correlation 12.4.2.5 Differential Diagnosis 12.4.2.6 Key Words 12.4.3 Trichorrhexis Nodosa 12.4.3.1 Introduction 12.4.3.2 Clinical Features 12.4.3.3 Trichoscopic Features 12.4.3.4 Histological Correlation 12.4.3.5 Differential Diagnosis 12.4.3.6 Key Words 12.4.4 Woolly Hair Syndrome 12.4.4.1 Introduction 12.4.4.2 Clinical Features 12.4.4.3 Trichoscopic Features 12.4.4.4 Histopathological Correlation 12.4.4.5 Differential Diagnosis 12.4.4.6 Key Words 12.4.5 Atrichia with Papular Lesions 12.4.5.1 Introduction 12.4.5.2 Clinical Features 12.4.5.3 Trichoscopic Features 12.4.5.4 Histopathological Correlation 12.4.5.5 Differential Diagnosis 12.4.5.6 Key Words 12.4.6 Scalp Psoriasis 12.4.6.1 Introduction 12.4.6.2 Clinical Features 12.4.6.3 Trichoscopic Features 12.4.6.4 Histopathological Correlation 12.4.6.5 Differential Diagnosis 12.4.6.6 Key Words References 13: Miscellaneous Conditions 13.1 Acne Vulgaris 13.1.1 Introduction 13.1.2 Clinical Features 13.1.3 Dermoscopic Features 13.1.4 Histopathological Correlation 13.1.5 Differential Diagnosis 13.1.6 Key Words 13.2 Callosity 13.2.1 Introduction 13.2.2 Clinical Features 13.2.3 Dermoscopic Features 13.2.4 Histopathological Correlation 13.2.5 Differential Diagnosis 13.2.6 Key Words 13.3 Corn 13.3.1 Introduction 13.3.2 Clinical Features 13.3.3 Dermoscopic Features 13.3.4 Histopathological Correlation 13.3.5 Differential Diagnosis 13.3.6 Key Words 13.4 Digital Mucous Cyst 13.4.1 Introduction 13.4.2 Clinical Features 13.4.3 Dermoscopic Features 13.4.4 Histopathological Correlation 13.4.5 Differential Diagnosis 13.4.6 Key Words 13.5 Dyssebacea 13.5.1 Introduction 13.5.2 Clinical Features 13.5.3 Dermoscopic Features 13.5.4 Histopathological Correlation 13.5.5 Differential Diagnosis 13.5.6 Key Words 13.6 Dystrophic Calcinosis Cutis 13.6.1 Introduction 13.6.2 Clinical Features 13.6.3 Dermoscopic Features 13.6.4 Histopathological Correlation 13.6.5 Differential Diagnosis 13.6.6 Key Words 13.7 Erythromelanosis Follicularis Faciei Et Colli 13.7.1 Introduction 13.7.2 Clinical Features 13.7.3 Dermoscopic Features 13.7.4 Histopathological Correlation 13.7.5 Differential Diagnosis 13.7.6 Key Words 13.8 Keloid 13.8.1 Introduction 13.8.2 Clinical Features 13.8.3 Dermoscopic Features 13.8.4 Histopathological Correlation 13.8.5 Differential Diagnosis 13.8.6 Key Words 13.9 Lipodermatosclerosis 13.9.1 Introduction 13.9.2 Clinical Features 13.9.3 Dermoscopic Features 13.9.4 Histopathological Correlation 13.9.5 Differential Diagnosis 13.9.6 Key Words 13.10 Morphea 13.10.1 Introduction 13.10.2 Clinical Features 13.10.3 Dermoscopy Features 13.10.4 Histopathological Correlation 13.10.5 Differential Diagnosis 13.10.6 Key Words 13.11 Pemphigus Vulgaris 13.11.1 Introduction 13.11.2 Clinical Features 13.11.3 Dermoscopic Features 13.11.4 Histopathological Correlation 13.11.5 Differential Diagnosis 13.11.6 Key Words 13.12 Pemphigus Foliaceous 13.12.1 Introduction 13.12.2 Clinical Features 13.12.3 Dermoscopic Features 13.12.4 Histopathological Correlation 13.12.5 Differential Diagnosis 13.12.6 Key Words 13.13 Phrynoderma 13.13.1 Introduction 13.13.2 Clinical Features 13.13.3 Dermoscopic Features 13.13.4 Histopathological Correlation 13.13.5 Differential Diagnosis 13.13.6 Key Words 13.14 Porokeratosis 13.14.1 Introduction 13.14.2 Clinical Features 13.14.3 Dermoscopic Features 13.14.4 Histopathological Correlation 13.14.5 Differential Diagnosis 13.14.6 Key Words 13.15 Pigmented Purpuric Progressive Dermatosis 13.15.1 Introduction 13.15.2 Clinical Features 13.15.3 Dermoscopic Features 13.15.4 Histopathological Correlation 13.15.5 Differential Diagnosis 13.15.6 Key Words 13.16 Reactive Perforating Collagenosis 13.16.1 Introduction 13.16.2 Clinical Features 13.16.3 Dermoscopic Features 13.16.4 Histopathological Correlation 13.16.5 Differential Diagnosis 13.16.6 Key Words 13.17 Talon Noir 13.17.1 Introduction 13.17.2 Clinical Features 13.17.3 Dermoscopic Features 13.17.4 Histopathological Correlation 13.17.5 Differential Diagnosis 13.17.6 Key Words References