Search Results for: infundibulitis

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Histologic Diagnosis of Inflammatory Skin Diseases

Fox-Fordyce disease

…osis pilaris and phrynoderma from consideration. When infundibula of those latter two conditions rupture, granulomatous peri-infundibulitis is an inevitability. Spongiosis in infundibula may be encountered in seborrheic dermatitis and rosacea,…

Differential Diagnosis in Dermatopathology

Trichotillomania (developed fully) vs. Traction alopecia (end stage)

An inflammatory process, caused by the spirochete Treponema pallidum, that tends to evolve through three stages, namely, primary (typified usually by a solitary chancre), secondary (characterized by widespread macules and papules on skin and mucous…

Histologic Diagnosis of Inflammatory Skin Diseases

Keloid

…agen” is indistinguishable histopathologically from that of a true keloid. Keloids may develop at sites of suppurative infundibulitis (“folliculitis”), e.g., acne keloidalis, but not all papules and nodules of that condition show…

Histologic Diagnosis of Inflammatory Skin Diseases

Mucha-Habermann disease

…s by arthropods, individual lesions are relatively similar to one another, and papules usually are not purpuric. Suppurative infundibulitis is pustular and because it affects infundibula, individual lesions are more or less equidistant from one…

Histologic Diagnosis of Inflammatory Skin Diseases

Necrobiosis lipoidica

…ated by striking pseudocarcinomatous (infundibular) proliferation of keratocytes that tends to be accompanied by suppurative infundibulitis. That riveting finding is a clue helpful to differentiation of necrobiosis lipoidica from other palisaded…

Histologic Diagnosis of Inflammatory Skin Diseases

Seborrheic dermatitis

…f seborrheic dermatitis in some hemiparetics. Comment Seborrheic dermatitis basically is a spongiotic process, especially an infundibulitis, that can be differentiated from other spongiotic processes by proclivity of mounds of scale-crust for lips…

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