Differential Diagnosis in Dermatopathology

Discussions

…oma is a solitary excrescence that arises from the skin of an adult near an interphalangeal joint of a finger. The projection may be elongated (polypoid) or domed (sessile), but always is keratotic. Other fibromas that have attributes histopathologic…

Differential Diagnosis in Dermatopathology

Trichoadenoma vs. Microcystic adnexal carcinoma

A condition of persons of any age, but particularly children with a genetic proclivity for allergic rhinitis and conjunctivitis, and allergic asthma. Intense pruritus induces patients to rub the skin intensely and to scratch furiously, the resultant…

Differential Diagnosis in Dermatopathology

Discussions

…attributes histopathologic of xanthogranulomas (childhood and adult) and the for reticulohistiocytic granuloma, a student could conclude that the two “granulomas” were separate and distinct from one another. On closer inspection and on re…

Histologic Diagnosis of Inflammatory Skin Diseases

Erythema multiforme

…f fluids from skin unprotected by an epidermis. Lyell’s disease (toxic epidermal necrolysis) in adults is an expression fulminant of erythema multiforme, akin to Stevens-Johnson syndrome in children. Nikolsky’s sign can be elicited almost…

Differential Diagnosis in Dermatopathology

Discussions

…h sometimes is referred to imprecisely as the drug-induced or adult form of toxic epidermal necrolysis) because those two conditions have so many features in common. Both diseases are typified clinically by widespread reddish lesions, involvement of…