Dermpedia

Sharing dermatology and dermatopathology knowledge

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• 44 year old male with acute onset alopecia
• 67 years old woman with pigmented rash
• 69 y/o female with longstanding h/o atopic dermatitis with severe flares
• Melanoma with areas of epithelial differentiation/malignant basomelanocytic tumor?, Case 1
• A 36 year old healthy woman with a non-healing ulceration on the cheek
• Recurrent metastatic vulvar tumor previously diagnosed as poorly different squamous cell carcinoma in a 78 year-old woman
• Rapidly growing lower eyelid nodule associated with conjunctival erythema in a 59 year-old woman.
• A 13-year-old boy with a history of Carney Complex and a pigmented lesion
• 45 year-old woman with recent onset of a rapidly progressing painful rash on both breasts
• Papillomatous lesion on the caruncle of a 79 year-old-man
• Amelanotic cellular blue nevus
• 19 year-old female with firm erythematous papules on fingers and palms
• A 27-year-old male with a skin-colored papule on the left year
• 30-year-old male with one year history of changing nodule on the forehead
• Misdiagnosed squamous tumor metastatic to sentinel lymph node
• 36 year-old female with a fleshy papule on the left chest below the breast
• Pigmented apocrine hamartoma (of the vulva), a new entity or a variant of apocrine hidrocystoma?
• A consultation from Norway
• How to diagnose urticaria histologically?
• Probably the most commonly misdiagnosed dermatosis.
• Interesting pigmented lesion
• Rush biopsy
• Early histological changes in glucagonoma
• Typical histology but somewhat unusual age and location
• Another "baso/squamo-melanocytic tumor"
• Acute erythema nodosum with early neutrophilic component or a neutrophilic dermatosis?
• 32 year-old Caucasian female with suspected melanoma on the proximal forearm
• Superficial basal cell carcinoma with a bonus diagnosis
• Always a challenging diagnosis
• Sebaceous adenoma as a clue to Muir-Torre syndrome
• Recurrent nevus
• A diagnostic pitfall
• A well hidden diagnosis
• Classic reactive lymphoid hyperplasia (cutaneous B cell pseudolymphoma)
• Atypical genital melanocytic proliferation in a 25 year-old female
• Aggressive digital papillary adenoma/adenocarcinoma
• 35 year-old female with suspected melanoma on the right shoulder
• A surprise
• Severely atypical Spitz tumor with lymph node metastases
• Benign process misdiagnosed as squamous cell carcinoma
• Bananas
• Aplasia cutis congenita
• Elastosis perforans serpiginosa
• A very rare case
• Pigmented epithelioid melanocytoma from a patient with Carney Complex
• A small red papule on the upper eyelid in a 27 year old female
• Pigmented epithelioid melanocytoma from a patient with Carney Complex
• Atypical pigmented lesion from the patient with Carney Complex
• 13 month old African American girl with chronic bullous eruption
• Syringotropic melanoma
• Borderline melanocytic tumor (MELTUMP)
• Frequent diagostic problem
• Trichoadenoma
• Insect bite?
• Juvenile conjunctival nevus
• Atypical nevus or nevoid melanoma?
• Pigmented epithelioid melanocytoma from a patient with Carney Complex
• Diagnostic pitfall: a mimic of melanoma or Spitz nevus
• Xanthogranuloma (juvenile type)
• Rare variant of a rare tumor.
• 28 year old Caucasian female with black tumor on the scalp and lymph node metastases
• Kaposi sarcoma, early patch stage
• Case 9
• Case 10
• Case 11
• Case 12
• Case 13
• Atypical acral nevus
• Case 8
• Right temple tumor submitted as "suspicious for sebaceous carcinoma"
• Early invasive melanoma
• Congenital nevus with proliferative nodules
• Nevoid melanoma
• Adnexal tumor versus BCC
• 11-year-old girl with brown-tan papules on her back and chest
• Right cheek lesion, 12-year-old girl
• Inverted follicular keratosis
• 54 year-old HIV-positive male with upper back thickenning.
• Right arm lesion, 53-year-old woman
• Proliferating epidermal cyst
• Neuroma
• Scabies
• Inverted follicular keratosis
• Dermal duct tumor
• Atypical cellular blue nevus
• Malignant blue nevus
• Case 8 (2 separate biopsies)
• Case 9
• Case 10
• Case 11
• 88-year-old man with red-purple plaques on chest and face and a history of Waldenstrom's macroglobulinemia
• Cellular blue nevus
• Psoriasis
• Atypical Spitz nevus
• Acantholytic actinic keratosis
• Apocrine adenoma
• Mongolian spot
• Clark's nevus
• Halo nevus with regression
• Axillary granular keratosis
• Clonal nevus with severe atypia
• Clonal nevus with moderate atypia
• Perniosis
• Lentiginous compound dysplastic nevus with severe atypia
• Primary cutaneous marginal zone B-cell lymphoma
• Cicatricial pemphigoid
• Early deep dermal morphea
• Perianal lesion, 47-year-old woman
• Re-excision of BCC
• Back lesion; history of hidradenoma
• Scalp lesion, 25-year-old woman- a newly described entity
• 39-year-old woman with multiple pigmented lesions over an 8-year period
• Spitz tumor (borderline lesion)
• Hidrocystoma
• PLEVA with increased CD30+ cells
• Nevus with pseudovascular spaces
• Nodular hidradenoma
• Lichen nitidus
• Clear cell hidradenoma
• Scleredema
• Gout
• Vulvar lichen planus
• Apocrine hidrocystoma
• A 23 year-old man with a 1 year history of multiple (15) painful papules in dermatomal distribution on his shoulder
• 92 year-old female with a recently discovered pigmented lesion