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"The skin is a mirror of the body. Look to the skin for specific manifestations of diseases."

Welcome to the Dermatopathology website designed, created and maintained by 

Dr Sampurna Roy MD   

"The contents of this site is based on my experience, discussion with colleagues and information from text books and journals"



Dr  Sampurna Roy  MD

Consultant Histopathologist

(Kolkata - India)




10 Microscopic Features of Acute Febrile Neutrophilic Dermatosis (Sweet's Syndrome)

Dermatopathology Quiz Cases

Pathology Photo of the Day-Stay CALM and have Coffee-Café-au-lait macule (CALM)

Pathology Photo of the Day - A Blue Turban with Pink border

Pathology Photo of the Day - Baboon and Skin Disease

Pathology Photo of the Day -Cloves and Newborn

Cow's Den - Cowden's syndrome

Pathology Photo of the Day and 2 questions:Cornoid Lamella

Pathology Photo of the Day - "On a WHIM"

Hyaline - Value of a descriptive word in General Pathology and Dermatopathology


Histology of the Normal Skin


Gross examination of the skin specimen

Reporting of biopsies taken for Inflammatory Skin Diseases

Lichenoid (Interface)Tissue Reaction Pattern

Psoriasiform Reaction Pattern

Vesiculobullous Reaction Pattern

Spongiotic Reaction Pattern

Vascular Diseases: Various forms of Vasculitis

Granular Parakeratosis

Lichen planus-like lesions

Lichen Nitidus

Pemphigoid Gestationis

Bullous Pemphigoid

Dermatitis Herpetiformis

Hailey-Hailey Disease 

Granulomatous Reaction Pattern of the Skin

Granuloma Annulare

Necrobiosis Lipoidica

Necrobiotic Xanthogranuloma  

Rheumatoid Nodule

Lupus Vulgaris

Cutaneous Sarcoidosis

Melkersson Rosenthal Syndrome

Annular Elastolytic Giant Cell Granuloma

Skin lesion in Crohn's Disease

Blastomycosis-like pyoderma

Foreign body granuloma


Interstitial Granulomatous Dermatitis

Interstitial Granulomatous Drug Reaction

Pathology of Discoid Lupus  Erythematosus

Pathology of Chilblains (Perniosis) and Equestrian Perniosis

Erythema Nodosum



Furuncle (Boil)


Toxic Shock Syndrome

Allergic Granulomatosis (Churg-Strauss Syndrome)

Erythema Elevatum Diutinum

Median Raphe Cyst

Cutaneous Ciliated Cyst

Infective Panniculitis

Pancreatic Panniculitis

Drug related cutaneous lesions

Cutaneous lesion in graft-
versus host disease

Cutaneous lesions after exposure to Radiation

Digital Mucous (Myxoid) Cyst

Superficial Acral Fibromyxoma

Pathology of Merkel Cell Carcinoma

Keloid of the Ear

Chondrodermatitis Nodularis Chronica Helicis

Skin Tumours

Skin Adnexal (Appendage) Tumours

Benign Sweat Gland Tumours

Apocrine/Eccrine Hidrocystoma


Chondroid syringoma


Syringocystadenoma Papilliferum   

Hidradenoma Papilliferum 

Nipple Adenoma





Papillary Eccrine Adenoma

Apocrine Adenoma


Classification of Malignant Sweat Gland Tumours 

Microcystic adnexal carcinoma

Syringomatous carcinoma (Eccrine Carcinoma ; Syringoid Carcinoma)

Cutaneous adenoid cystic carcinoma

Mucinous carcinoma

Primary extramammary Paget’s disease


Digital papillary adenocarcinoma


Apocrine adenocarcinoma

Eccrine ductal carcinoma


Malignant cylindroma

Clear cell carcinoma

Tumours of the Hair Follicle


Desmoplastic trichoepithelioma



Cutaneous lymphadenoma

Basaloid Follicular Hamartoma


Dilated Pore of Winer

Pilar Sheath Acanthoma

Tumour of the Follicular Infundibulum


Desmoplastic Trichilemmoma

Trichilemmal Carcinoma 

Proliferating Trichilemmal Tumour


Pilomatrix Carcinoma

Sebaceous tumours

Fordyce's Spots


Nevus Sebaceous

Folliculosebaceous Cystic Hamartoma

Sebaceous Hyperplasia


Sebaceous Adenoma

Sebaceous Carcinoma

Cutaneous Deposits

Calcinosis Cutis

Cutaneous Ossification (Osteoma Cutis)

Cartilaginous Lesions of the Skin

Pretibial Myxedema

Lipoid Proteinosis

Pathology of Colloid Milium


Silicone granulomas

Pathology of Xanthelasma

Pathology of Verruciform Xanthoma

Pathology Photo of the Day - LEOPARD

Dermatopathology patterns that remind us of something else

Five Tumors of the Finger: "Finger Art" by a Pathologist 

Pathology Photo of the Day -"Blueberry Muffin is not for your Baby": Blueberry Muffin Syndrome

Melanocytic Tumours

Acquired Melanocytic Nevus

Ancient Nevus

Halo Nevus

Balloon Cell Nevus

Congenital Nevus

Deep Penetrating Nevus

Dysplastic Melanocytic Nevus (Atypical Nevus)

Blue Nevus and variants

Spitz Nevus; Atypical Spitz Nevus and Spitzoid Melanoma

Desmoplastic Spitz Nevus

Combined Nevus

Recurrent Nevus

Pigmented Spindle Cell Nevus (Reed Nevus)

Lentigo Maligna Melanoma

Superficial Spreading Melanoma

Nodular Melanoma

Acral Lentiginous Melanoma

Desmoplastic and 
Neurotropic Melanoma

Nevoid Melanoma

Balloon Cell Melanoma

Prognostic Parameters of Melanoma

Variants of Melanoma that can be mistaken for a Benign lesion


Epidermal Nevus

Inflammatory Linear Verrucous Epidermal Nevus

Dermatosis Papulosa Nigra

Seborrheic keratosis

Acanthomas - [ Epidermolytic acanthoma; Acantholytic acanthoma; Melanoacanthoma ]

Prurigo Nodularis

Clear cell acanthoma

Large cell acanthoma

Warty Dyskeratoma

Virally Induced Epidermal Lesions (Verruca vulgaris; Palmoplantar wart; Verruca plana)

Epidermodysplasia verruciformis

Condyloma Acuminatum

Molluscum contagiosum


Bowen's disease

Bowenoid papulosis

Actinic keratosis


A systematic approach to diagnose cutaneous infections by dermatopathologists

Cutaneous Infections and Infestations

Histoid Leprosy

1 : Bacterial, Rickettsial and Chlamydial Infections

2 : Spirochetal Infections

3 : Mycoses and algal Infections

4 : Protozoal Infections

5 : Helminth Infections

6 : Viral Infections



Pathology of Subcutaneous Panniculitis-Like T-Cell Lymphoma

Pathology of Pagetoid reticulosis (Woringer-Kolopp disease)

Pathology of Lymphomatoid Papulosis - Cells resembling 'chunks of coal'

Pathology of Primary Cutaneous Anaplastic Large Cell Lymphoma

Pathology of Cutaneous B-Lymphoblastic Lymphoma

Pathology of Intravascular Large B-cell Lymphoma

Pathology of Primary Cutaneous Marginal Zone B-Cell Lymphoma

Pathology of Primary Cutaneous Diffuse Large B-Cell Lymphoma






Gallbladder Pathology Online


Pathology Quiz Online 


Paediatric Pathology Online


Pancreatic Pathology Online




Endocrine Pathology Online


Eye Pathology Online


Ear Pathology Online


Cardiac Path Online


Pulmonary Pathology Online


Lung Tumour Online




Nutritional Pathology Online


Environmental Pathology Online


Soft Tissue Tumour Online


GI Path Online-India


Case Index


E-book - History of Medicine  


Microscope - Seeing the Unseen





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