Search Results for: infundibulum

Histologic Diagnosis of Inflammatory Skin Diseases

Pyoderma gangrenosum

…on clinicopathologic The initial pustule represents suppurative infundibulitis. At first, neutrophils are found mostly in an infundibulum; in time, they are present mostly around the involved infundibulum, and still later, the original infundibular…

Histologic Diagnosis of Inflammatory Skin Diseases

Applicable Terms

…(to which should be added a fourth analogue, i.e., acne keloidalis). A sinus forms as a result of re-epithelialization of an infundibulum as it attempts to restore itself to its original state after having burst and ejected its contents, mostly of…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Apocrine Miliaria?

…dyce disease seems to be plugging of infundibula by corneocytes; spongiosis at the site of entry of an apocrine duct into an infundibulum is a phenomenon secondary, i.e., consequent to an infundibulum blocked by cornified cells. In brief, the…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Eruptive Vellus Hair Cyst?

…nd of a follicle well advanced in catagen (the appearance of those two epithelia being identical), but also like that of the infundibulum of epidermis, the infundibulum and isthmus being in continuity normally. In short, cutaneous cysts, cystic…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

…with neutrophils, ruptured. The incipient granulomatous inflammation represents a foreign body reaction to contents of that infundibulum. 10.38.2A: Pustular dermatitis, infundibular + 10.38.2B: A hair in the center of an abscess = Suppurative…

Histologic Diagnosis of Inflammatory Skin Diseases

Lichen planus

…and the latter by no infiltrate of lymphocytes extending along the stem and the bulb of a follicle, by fibrosis between the infundibulum and the lichenoid infiltrate of lymphocytes, and by fibrous tracks widened by markedly thickened collagen…

Histologic Diagnosis of Inflammatory Skin Diseases

Apocrine Units

…a manner similar to that of the eccrine duct through surface epidermis (Fig. 1.54). Figure 1.54 An apocrine duct enters the infundibulum of an epidermis above the entry of a sebaceous duct, which is at the junction of infundibulum and isthmus. The…

Histologic Diagnosis of Inflammatory Skin Diseases

Pattern Analysis in Historical Perspective

…20;suppurative folliculitis” (even if that term is not correct precisely) is extension directly of suppuration from an infundibulum to a follicle seated immediately beneath and in continuity with it, the parts of a true follicle, from top to…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

…c pustular folliculitis/papular eruption of HIV The scale-crust is situated at a site where a pustule, housed at first in an infundibulum, had been scratched, a discrete ulcer marking that spot. The perivascular and interstitial infiltrate is…