Dermatopathology
Article
Nail Biopsy: 6 Techniques to Biopsy the Nail Matrix
Photo Challenge
What Is Your Diagnosis? Extramammary Paget Disease
A 70-year-old man presented with a nonpruritic erythematous scaly plaque in the left suprapubic region of 6 months’ duration that had failed to...
Dermpath Diagnosis
Onchocerciasis
The larvae of Onchocerca volvulus, a nematode that is most commonly found in tropical Africa, Yemen, Central America, and South America, are...
Dermpath Diagnosis
Pseudoglandular Squamous Cell Carcinoma
Squamous cell carcinoma (SCC) is the second most common form of skin cancer. Pseudoglandular SCC presents most often on sun-damaged skin of...
Photo Challenge
What Is Your Diagnosis? Acquired Lymphangiectasia
A 19-year-old woman presented with an umbilical mass of 5 months’ duration that had grown in size. Physical examination revealed a 1×1-cm brownish...
Case Reports
Angioimmunoblastic T-cell Lymphoma Presenting as Purpura Fulminans
Purpura fulminans is a nonspecific hematologic emergency with high initial mortality, representing a thrombotic occlusion of blood vessels leading...
Case Reports
Epithelioid Sarcoma Resembling Benign Fibrous Histiocytoma
Epithelioid sarcoma (ES) is a rare malignancy notorious for its tendency to histologically mimic granuloma annulare and other palisading...
Case Reports
Superficial Acral Fibromyxoma and Other Slow-Growing Tumors in Acral Areas
Superficial acral fibromyxoma (SAFM) is a rare fibromyxoid mesenchymal tumor with a predilection for the distal extremities and frequent nail bed...
Photo Challenge
Tense Bullae With Widespread Erosions
A 50-year-old black man presented with a new-onset widespread pruritic bullous eruption 7 months after being diagnosed with human immunodeficiency...
Photo Challenge
Lobular-Appearing Nodule on the Scalp
A 79-year-old woman presented with a lesion on the left side of the scalp of several years’ duration that had slowly increased in size. Despite...
Dermpath Diagnosis
Localized Argyria With Pseudo-ochronosis
Localized cutaneous argyria often presents as asymptomatic black or blue-gray pigmented macules in areas of the skin exposed to silver-containing...