Histologic Diagnosis of Inflammatory Skin Diseases

Images

…lliculorum and squames in a zone of suppuration = Suppurative infundibulitis of unknown cause Demodex, Pityrosporum, bacteria, sebum, squames, and cornified cells, as well as neutrophils of a suppurative infundibulitis are sent flying into the dermis…

Histologic Diagnosis of Inflammatory Skin Diseases

Identification of Basic Patterns: Skin: Pustular Dermatitis

…s enterprise, those of 1978 and of 1997, the misconception of infundibulitis being folliculitis was perpetuated; in this edition, we hasten to rectify it. For that reason, the category of “folliculitis,” linked in the two editions past to…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

Images 10.94.1A: Infundibulitis, spongiotic, and peri-infundibulitis, granulomatous + 10.94.1B: Lymphocytes and plasma cells around collections of epithelioid histiocytes = Rosacea, papular ┬áSpongiosis in an infundibulum is a finding comm…

Histologic Diagnosis of Inflammatory Skin Diseases

Applicable Terms

…that is, epithelium of the isthmus, stem, and bulb. See also INFUNDIBULITIS/PERI-INFUNDIBULITIS. GRANULATION TISSUE [L. granulum (granule) + -onis (forming) + textere (to weave)]: Highly vascular edematous connective tissue laced with a mixture of i…

Histologic Diagnosis of Inflammatory Skin Diseases

Pattern Analysis in Historical Perspective

…lly as “folliculitis” in actuality is suppurative infundibulitis, recognizing, full well, that the notion of folliculitis, infundibulitis, and hidradenitis, to mention only three examples, is flawed fundamentally; there can be dermatitis…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

…sence of perifolliculitis, even in the absence of suppurative infundibulitis, should prompt a search for hyphae in cornified cells of a follicle, the fungi here being present in both hair shaft and inner sheath. 10.22.13A: Folliculitis and peri…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

…relatively early because it is so small. 10.60.6A: Peri-infundibulitis, lichenoid + 10.60.6B: Infiltrate of lymphocytes in an arc at the base of a thickened, hypergranulotic infundibulum associated with compact orthokeratosis = Lichen planu…

Histologic Diagnosis of Inflammatory Skin Diseases

Errors and Reasons

…urative folliculitis,” actually is a “suppurative infundibulitis”; the follicle itself, namely, the isthmus, the stem, and the bulb, nearly always is spared. Error: Folliculitis decalvans is a specific inflammatory disease that ends…

Differential Diagnosis in Dermatopathology

Acne vulgaris, erythematous papule vs. Rosacea, erythematous papule

An inflammatory process that results from the effects of a drug administered systemically, e.g., by ingestion, inhalation, injection, or application rectally, and manifested usually by lesions distributed widely and symmetrically. Any of the many ex…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

….63.7A: Perivascular dermatitis, interface, vacuolar and peri-infundibulitis/perifolliculitis + 10.63.7B: Lymphocytes, telangiectases, mucin in the upper part of the dermis, thickened basement membrane of thin surface and infundibular epidermis =…