Search Results for: infundibulum

1 3 4 5 6 7 10
Histologic Diagnosis of Inflammatory Skin Diseases

Our Definition of “Inflammation” and “Inflammatory Disease”

…in which the plug of corneocytes may penetrate the wall of an infundibulum and, as a consequence, call forth neutrophils followed by lymphocytes and, sometimes, histiocytes and later fibrocytes. A caricature of that phenomenon is what follows on rupt…

Histologic Diagnosis of Inflammatory Skin Diseases

Algorithms Predicated on “Nonspecific” Findings

…ular Plug of Corneocytes Cast of cornified cells in a dilated infundibulum. Click image to enlarge. + Thickened epidermal basement membrane = Discoid lupus erythematosus + Spongiosis in affected infundibula, plugs of both ortho- and parakeratotic cel…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Tricho-, pilo-, folliculo- ?

…; later the same process is called trichodiscoma. Although an infundibulum of epidermis is positioned in the center of each segment of fibrofolliculoma, the condition actually is an abnormality of mantles of a follicle, those distinctive cords of und…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

…221; of nuclear chromatin and multinucleate corneocytes in an infundibulum = Infection by herpesvirus, early If a microscopist fails to take note of the subtle changes in the infundibulum shown here, the diagnosis of herpesvirus will be missed. Not u…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Epidermal Cyst and Epidermoid Cyst?

…being an infundibular cyst, a true epidermal cyst because the infundibulum is as much epidermis as is surface epidermis. The epithelium that lines virtually all other cutaneous cysts is like that of adnexal epithelium, namely, follicular, sebaceous,…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Common Baldness—an Inflammatory Disease?

…erate inflammatory infiltrate at the level of the isthmus and infundibulum. This can also be seen in scalp biopsies from normal patients or those with seborrheic dermatitis. We could not detect obvious inflammation in the lower portion of deeply seat…

Histologic Diagnosis of Inflammatory Skin Diseases

Infundibulofolliculitis, disseminate and recurrent

…ed at the site where an apocrine duct is presumed to enter an infundibulum plugged by cornified cells. Some lesions exhibit coronoid lamellation in infundibula and foamy histiocytes around them. The process usually is confined to axillae. Atopic derm…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Perforating Diseases?

…s said to result from extrusion of contents suppurative of an infundibulum into the dermis. When the term was introduced, proponents of it contended that the condition was different from conventional suppurative folliculitides when, in actuality, vir…

Histologic Diagnosis of Inflammatory Skin Diseases

Traction alopecia

…dlike infiltrate of lymphocytes may extend from the top of an infundibulum to the base of a follicle, rather than along the infundibulum mostly, the fibroplasia around infundibula and follicles is joined by lymphocytes, rather than lymphocytes in a b…

Histologic Diagnosis of Inflammatory Skin Diseases

Eccrine Units

…relation to the hair follicle per se, which resides below the infundibulum, although in continuity with it. The hair itself does pass through the infundibular canal en route to reaching the surface of the skin, from which it exits by way of an ostium…

1 3 4 5 6 7 10