Search Results for: infundibulum

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Histologic Diagnosis of Inflammatory Skin Diseases

Algorithms Predicated on “Nonspecific” Findings

…viable epidermis = Toxic-shock syndrome     Infundibular Plug of Corneocytes Cast of cornified cells in a dilated infundibulum. Click image to enlarge. + Thickened epidermal basement membrane = Discoid lupus erythematosus + Spongiosis in…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Tricho-, pilo-, folliculo- ?

…f it. At an early stage the hamartoma is named fibrofolliculoma; later the same process is called trichodiscoma. Although an infundibulum of epidermis is positioned in the center of each segment of fibrofolliculoma, the condition actually is an…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

…s + 10.47.10B: Ballooned keratocytes with “margination” of nuclear chromatin and multinucleate corneocytes in an infundibulum = Infection by herpesvirus, early If a microscopist fails to take note of the subtle changes in the…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Epidermal Cyst and Epidermoid Cyst?

…re related to adnexal epithelium, not epidermis, the exception being an infundibular cyst, a true epidermal cyst because the infundibulum is as much epidermis as is surface epidermis. The epithelium that lines virtually all other cutaneous cysts is…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Common Baldness—an Inflammatory Disease?

…f our specimens [of common baldness] demonstrated a mild to moderate inflammatory infiltrate at the level of the isthmus and infundibulum. This can also be seen in scalp biopsies from normal patients or those with seborrheic dermatitis. We could not…

Histologic Diagnosis of Inflammatory Skin Diseases

Infundibulofolliculitis, disseminate and recurrent

…s marked by spongiosis, but the focus of spongiosis is positioned at the site where an apocrine duct is presumed to enter an infundibulum plugged by cornified cells. Some lesions exhibit coronoid lamellation in infundibula and foamy histiocytes…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Perforating Diseases?

…t a folliculitis but an epidermitis, i.e., an infundibulitis, is said to result from extrusion of contents suppurative of an infundibulum into the dermis. When the term was introduced, proponents of it contended that the condition was different from…

Histologic Diagnosis of Inflammatory Skin Diseases

Traction alopecia

…ction alopecia, but in infundibulocentric lichen planus the bandlike infiltrate of lymphocytes may extend from the top of an infundibulum to the base of a follicle, rather than along the infundibulum mostly, the fibroplasia around infundibula and…

Histologic Diagnosis of Inflammatory Skin Diseases

Eccrine Units

…infundibular epidermis through surface epidermis, it having no relation to the hair follicle per se, which resides below the infundibulum, although in continuity with it. The hair itself does pass through the infundibular canal en route to reaching…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

…s + 10.94.1B: Lymphocytes and plasma cells around collections of epithelioid histiocytes = Rosacea, papular Spongiosis in an infundibulum is a finding common in rosacea and in analogues of it, to wit, perioral and periocular dermatitis. 10.94.2A:…

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