Dermatology Practical & Conceptual

Dermatoscopy of folliculosebaceous cystic hamartoma

…29-year-old Japanese man presented to our institution with a nodule on his nose that had increased in size since childhood. Physical examination indicated the presence of an elastic, firm, pedunculated red nodule measuring 15 mm in size. Dermatoscop…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

…fluent epidermal necrosis with a ragged base = Picker’s nodule The hyperkeratosis, hypergranulosis, and psoriasiform acanthosis in a dome-shaped papule represent prurigo nodularis, whereas necrosis in a band across the upper part of the epiderm…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Verruciform Xanthoma?

…-year-old man presented to our department with a scrotal skin nodule, first noted as a papule two to three years previously. The nodule was red and pedunculated with a granular surface and a diameter of 10 mm. Three red papules were scattered around…

Dermatology Practical & Conceptual

Pseudofolliculitis barbae: a dermatoscopic correlate

…y. Physical examination revealed a solitary 1 cm erythematous nodule in the right submental area. Dermatoscopy showed a structureless pattern with a gray-blue, thick, curved line and adjacent red lines (Figure 1), which appeared to be a subcuticular…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Radial Growth Phase versus Vertical Growth Phase of Melanoma?

…ce of the radial growth phase is the incapacity to form tumor nodules in the dermis. Thus the radial growth phase may also be called nontumorigenic. . . . The vertical growth phase is, by definition, the appearance of a population of cells within the…

Dermatology Practical & Conceptual

Melanoma arising in a giant nevus spilus maculosus

…ort A 78-year-old Caucasian woman presented with an ulcerated nodule in the right pretibial region (Figure 1). The nodule measured 1 cm in diameter and was surrounded by an erythema. It had grown in a large pre-existing, congenital pigmented lesion t…

Histologic Diagnosis of Inflammatory Skin Diseases

Farmyard pox

…g men who are herders of sheep (orf) and cows (milker’s nodule), and in veterinarians Distribution of lesions Fingers especially Configuration of lesions Annular sometimes Individual lesions Papules, nodules Course Lesions regress slowly over m…