Search Results for: infundibulum

Histologic Diagnosis of Inflammatory Skin Diseases

Mycosis fungoides

…hat phenomenon pertained solely to surface epidermis. But the infundibulum is just as much epidermis as is surface epidermis, the two having the very same appearance histopathologic; that being the case, it should come as no surprise that that funnel…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

…in the dermis, also as “flame figures” and in an infundibulum + 10.5.38C + 10.5.38D = Response to an arthropod assault The 6-month-old boy from whom this specimen came had “unquestionable insect “bites” that are seen he…

Differential Diagnosis in Dermatopathology

Dilated pore vs. Pilar sheath acanthoma

A hyperplasia of infundibular epithelium consequent to the effects of infection by a pox virus and manifesting itself clinically as one or more skin-colored, smooth-surfaced, dome-shaped papules, each with a central umbilication filled with horny ma…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Reactive Perforating Collagenosis?

…xuberant sufficiently, “perforate” the wall of an infundibulum, resulting in neutrophils and other infundibular contents being spewed into the dermis) complicated by the effects of rubbing and scratching. In summary, much that has been wr…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Trichodiscoma Related to the Hair Disk and Merkel-Cell Neoplasm to Merkel Cells?

…cribed first by Felix Pinkus, emerge from the junction of the infundibulum and isthmus and, in sections cut vertically, are seen to hang as cords of undifferentiated epithelial cells along the sides of the follicle and parallel to it. Because those c…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

…of acantholytic dyskeratotic cells in the spinous zone of an infundibulum = Grover’s disease As a rule, Grover’s disease, like Darier’s disease, has no predilection for infundibular epidermis, favoring instead surface epidermis. Th…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Origin of Adnexal Neoplasms?

…s its development as a bulge or collar at the junction of the infundibulum and isthmus of the hair follicle.” Weedon D. Skin Pathology. London: Churchill Livingstone, 2002. Implicit in the thinking of many general pathologists is the assumption…

Histologic Diagnosis of Inflammatory Skin Diseases

Granuloma faciale

…les, each producing a hair which emerges from an ostium of an infundibulum. Differential diagnosis histopathologic Erythema elevatum diutinum, for purposes practical, is identical with granuloma faciale, except for findings histologic that pertain to…