Search Results for: infundibulum

Histologic Diagnosis of Inflammatory Skin Diseases

Mycosis fungoides

…pism, in the popular mind of dermatologists and pathologists, that 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;…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

…d infundibulitis + 10.5.38B: Lymphocytes and eosinophils mostly 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…

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…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Reactive Perforating Collagenosis?

…ing folliculitis” (all suppurative infundibulitides, if exuberant sufficiently, “perforate” the wall of an infundibulum, resulting in neutrophils and other infundibular contents being spewed into the dermis) complicated by the…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

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

…le and of mantles of follicles in particular. Mantles, also described 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…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

…titial dermatitis, lymphocytes predominant + 10.44.12B: A focus 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…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Origin of Adnexal Neoplasms?

…he skin. They are derived from the sebaceous gland, which begins 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….

Histologic Diagnosis of Inflammatory Skin Diseases

Granuloma faciale

…condition does not affect the face with its many vellus follicles, each producing a hair which emerges from an ostium of an infundibulum. Differential diagnosis histopathologic Erythema elevatum diutinum, for purposes practical, is identical with…