Histologic Diagnosis of Inflammatory Skin Diseases

Algorithms Predicated on “Nonspecific” Findings

…+ On a face marked by extensive solar elastosis = Comedo of Favre-Racouchot disease + Infundibula plugged by parakeratotic cells = Phrynoderma + Alternation of orthokeratosis and parakeratosis in both vertical and horizontal directions and a pr…

Histologic Diagnosis of Inflammatory Skin Diseases

Applicable Terms

…in the skin above the zygoma constitute nodular elastoidosis (Favre-Racouchot syndrome). Steroid acne refers to comedones and pustules that are induced by prolonged administration of corticosteroids systemically or by application topically. CRUST [L….

Histologic Diagnosis of Inflammatory Skin Diseases

Acne vulgaris

…acne, and solar acne, the caricature of which is met with in Favre-Racouchot syndrome. Parenthetically, nevus comedonicus is an entirely different phenomenon, being a malformation congenital of infundibula, some of which extend in bloated form into…

Differential Diagnosis in Dermatopathology


…hose skin has been battered by sunlight, a condition known as Favre-Rachouchot syndrome. The latter condition is characterized by discrete infundibular cysts that, unlike the situation in trichoadenoma, are not connected to one another by columns of…