Search Results for: peri-infundibulitis

Histologic Diagnosis of Inflammatory Skin Diseases

Images

Images 10.94.1A: Infundibulitis, spongiotic, and periinfundibulitis, granulomatous + 10.94.1B: Lymphocytes and plasma cells around collections of epithelioid histiocytes = Rosacea, papular Spongiosis in an infundibulum is a finding common in…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

…d band, and in a late lesion, it is absent. This lesion can be told to be relatively early because it is so small. 10.60.6A: Periinfundibulitis, lichenoid + 10.60.6B: Infiltrate of lymphocytes in an arc at the base of a thickened, hypergranulotic…

Histologic Diagnosis of Inflammatory Skin Diseases

Applicable Terms

…esent either in or around follicular epithelium, that is, epithelium of the isthmus, stem, and bulb. See also INFUNDIBULITIS/PERIINFUNDIBULITIS. GRANULATION TISSUE [L. granulum (granule) + –onis (forming) + textere (to weave)]: Highly…

Histologic Diagnosis of Inflammatory Skin Diseases

Pattern Analysis in Historical Perspective

…ferred to previously as “perifolliculitis,” as a rule is seen in sections of tissue, cut routinely, to be “periinfundibulitis” (e.g., as in lichen planopilaris, traction alopecia, and discoid lupus erythematosus). Because…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

…tize cornified cells of hair, inner sheath, isthmus, and infundibulum. The fungi first induce suppurative infundibulitis and periinfundibulitis, then granulomatous periinfundibulitis, and, later, fibrosing periinfundibulitis and perifolliculitis…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

…ly in classic discoid lupus erythematosus and in dermatomyositis. 10.63.7A: Perivascular dermatitis, interface, vacuolar and periinfundibulitis/perifolliculitis + 10.63.7B: Lymphocytes, telangiectases, mucin in the upper part of the dermis,…

Histologic Diagnosis of Inflammatory Skin Diseases

Errors and Reasons

…d “drug eruption.” Error: Traction alopecia is not an inflammatory disease. Reason: Traction induces a lichenoid periinfundibulitis (and, sometimes, perifolliculitis, especially of the isthmus) composed mostly of lymphocytes and…

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

Images

…do in the context of the suppurative process is indicative of acne vulgaris. 10.1.2A: Pustular dermatitis, infundibular, and periinfundibulitis, granulomatous and fibrosing + 10.1.2B: Collections of neutrophils around a hair in a distorted…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

Images 10.39.1A: Infundibulitis, spongiotic, and periinfundibulitis + 10.39.1B: Predominance of lymphocytes in and around infundibula dilated by corneocytes = Fox-Fordyce disease Spongiosis in the wall of an infundibulum near the site where an…