Search Results for: infundibulitis

Histologic Diagnosis of Inflammatory Skin Diseases

Pattern Analysis in Historical Perspective

…f that being lichen planopilaris, lupus erythematosus, and, at times, secondary syphilis. Parenthetically, longstanding peri-infundibulitis alone or peri-infundibulitis in conjunction with perifolliculitis that affects only the uppermost part of the…

Histologic Diagnosis of Inflammatory Skin Diseases

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…phae tend to parasitize cornified cells of hair, inner sheath, isthmus, and infundibulum. The fungi first induce suppurative infundibulitis and peri-infundibulitis, then granulomatous peri-infundibulitis, and, later, fibrosing peri-infundibulitis

Histologic Diagnosis of Inflammatory Skin Diseases

Errors and Reasons

…t is termed “suppurative folliculitis” really is suppuration in infundibular epidermis, i.e., suppurative “infundibulitis.” Error: “Syndrome” must be distinguished clearly from “disease.” Reason: The…

Histologic Diagnosis of Inflammatory Skin Diseases

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…lum = Lichen planopilaris Only a sparse perivascular infiltrate of lymphocytes is residual of what once was a lichenoid peri-infundibulitis and perifolliculitis. What is seen here represents the denouement of the process, analogous to atrophic…

Differential Diagnosis in Dermatopathology

Acne vulgaris, erythematous papule vs. Rosacea, erythematous papule

…a foreign-body type of inflammatory process that results from penetration of the dermis by an ingrown hair. The phenomena of infundibulitis and pseudoinfundibulitis are referred to universally as “folliculitis” and…

Histologic Diagnosis of Inflammatory Skin Diseases

Majocchi’s granuloma

…cut through a specimen in search of follicles whose hair shaft and inner sheath are favorite haunts of hyphae of suppurative infundibulitis brought about by superficial fungi. Tinea barbae is one of many expressions of dermatophytic infundibulitis

Histologic Diagnosis of Inflammatory Skin Diseases

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…an “apocrine miliaria.” In short, Fox-Fordyce disease is not an apocrine analogue of eccrine miliaria. 10.39.2A: Infundibulitis, spongiotic + 10.39.2B: Peri-infundibulitis made up mostly of lymphocytes = Fox-Fordyce disease These are not…

Histologic Diagnosis of Inflammatory Skin Diseases

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…ce, mark this lesion as being that of lupus erythematosus. 10.63.10A: Perivascular dermatitis, interface, vacuolar, and peri-infundibulitis/perifolliculitis + 10.63.10B: Mucin in the reticular dermis, telangiectases, sclerosis in the upper dermis,…

Histologic Diagnosis of Inflammatory Skin Diseases

Hair Follicles

…s in staphylococcal pustulosis. In those conditions, infundibula are filled with neutrophils. Much less common is spongiotic infundibulitis, e.g., so-called infundibulofolliculitis, in which spongiosis mediated by lymphocytes is present in the wall…

Histologic Diagnosis of Inflammatory Skin Diseases

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…ne conglobata, hidradenitis suppurativa, and dissecting cellulitis of the scalp, all of which begin as fulminant suppurative infundibulitis. 10.1.3A: Pustular dermatitis, infundibular, and peri-infundibulitis, granulomatous + 10.1.3B: Hair shafts in…