Search Results for: infundibular%20folliculitis

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A Clinical Atlas of 101 Common Skin Diseases

Cysts and Cystic Hamartomas

Papules, nodules, and tumors that, on gross examination, are usually skin colored and, on histopathologic examination, consist of an epithelium-lined sac that contains fluid, cells, or both in the case of true cysts and of cysts that are associated…

A Clinical Atlas of 101 Common Skin Diseases

Molluscum Contagiosum

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…

Differential Diagnosis in Dermatopathology

Infundibular cyst vs. Isthmus-catagen cyst

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…

Histologic Diagnosis of Inflammatory Skin Diseases

Applicable Terms

…eratosis is found, too, in a type of epidermal cyst, i.e., an infundibular cyst, and in a “pseudocyst,” i.e., an infundibular tunnel in a lesion of seborrheic keratosis. Infundibular hyperkeratosis is the sine qua non for diagnosis of…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

…, Demodex, Pityrosporum, or bacteria are found in a pustule, the inference may be made rightly that the process basically is infundibular. 10.37.11A: Pustular dermatitis, infundibular + 10.37.11B: Neutrophils in conjunction with degenerated collagen…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

…ith numerous neutrophils and histiocytes, some of the latter multinucleate = Foreign body reaction to contents of a ruptured infundibular cyst An “infundibular cyst” is an epidermal cyst because the infundibulum is a component of the…

Histologic Diagnosis of Inflammatory Skin Diseases

"Folliculitis" (Infundibulitis)

…ive folliculitis, develops, irrespective of cause, as a consequence of emergence of neutrophils from capillaries in the peri-infundibular dermis, passage through the wall of the infundibulum, and entry into the infundibular canal. When the number of…

Histologic Diagnosis of Inflammatory Skin Diseases

Embryologic Development

…nation “folliculosebaceous-apocrine unit” is incorrect here because in an embryo, the apocrine unit derives from infundibular epidermis and the sebaceous unit from the junction of infundibular epidermis and follicle. That being so, the…

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