Search Results for: infundibulum

Histologic Diagnosis of Inflammatory Skin Diseases

Sebaceous Units

…us gland marks the site where lipid-producing glandular cells of sebaceous lobules meet stratified squamous epithelium of an infundibulum. A sebaceous duct is lined by a thin cornifying squamous epithelium with a barely detectable granular zone that…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

…follicles of which are in catagen or in telogen + 11.22.7B: Trichomalacia (clumps of melanin in a pleated hair shaft) in an infundibulum = Trichotillomania Often, signs of trichomalacia are present in only a single distorted hair shaft that reposes…

Histologic Diagnosis of Inflammatory Skin Diseases

Embryologic Development

…es an apocrine gland and the straight part above it becomes an apocrine duct whose lumen enters the upper part of the future infundibulum, just above the entrance of a sebaceous duct and on the side opposite it, the sebaceous duct entering the base…

Histologic Diagnosis of Inflammatory Skin Diseases

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…eing localized permanent alopecia. 10.22.16A: Pustular dermatitis, infundibular + 10.22.16B: Hyphae in cornified cells of an infundibulum and a hair = Dermatophytosis This, the suppurative stage of Majocchi’s granuloma, comes into being as a…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Pityrosporum Folliculitis and Demodectic Folliculitis?

…the follicle is formed of an isthmus, a stem, and a bulb. Histopathologists must disabuse themselves of the notion that the infundibulum is part of the follicle when, in actuality, it is epidermis in continuity with the follicle. The infiltrates of…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

…nalogous to atrophic lichen planus 10.60.15A: Peri-infundibulitis, fibrosing + 10.60.15B: Wedge-shaped hypergranulosis in an infundibulum = Lichen planopilaris The near absence of follicles from a section of a specimen taken from the scalp signifies…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

…fibrosing inflammation, the latter two shown here. 11.10.3A: Peri-infundibulitis, fibrosing + 11.10.3B: Fibrosis beneath an infundibulum dilated markedly by a plug of corneocytes = Keratosis pilaris Because the infundibulum has become thinned as a…