Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Churg-Strauss Granuloma and Allergic Granulomatosis?

…trates), attributable to a systemic vasculitis Paranasal sinus abnormality History of acute or chronic paranasal sinus pain or tenderness or radiographic opacification of the paranasal sinuses Extravascular eosinophils Biopsy including ar…

Histologic Diagnosis of Inflammatory Skin Diseases

Histiocytosis X

Histiocytosis X Presentation stereotypical Age and sex Children, boys mostly, and also adults Distribution of lesions Localized or widespread Individual lesions Red papules, purpuric papules, erosions, and ulcers Course Protracted, if not treated; s…

Differential Diagnosis in Dermatopathology

Trichoadenoma vs. Microcystic adnexal carcinoma

A disease of infundibulosebaceous units, especially infundibula, that may manifest itself solely as noninflammatory lesions, i.e., comedones and intact cysts, or as inflammatory lesions, i.e., papules, nodules, and pustules. The process may resolve…

Differential Diagnosis in Dermatopathology

Discussions

Trichoadenoma and microcystic adnexal carcinoma at times resemble each other sufficiently to pose a dilemma diagnostic, even though the former is a hamartoma and the latter an adenocarcinoma. Both may have several findings histopathologic in common:…