Search Results for: infundibulum

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A Clinical Atlas of 101 Common Skin Diseases

Acne Vulgaris

A disease of infundibulosebaceous units, especially infundibula, that may manifest itself solely as noninflammatory lesions, i.e., comedones and intact cysts, or as inflammatory lesions, i.e., papules, nodules, and pustules. The process may resolve…

A Clinical Atlas of 101 Common Skin Diseases

Keratosis Pilaris/Lichen Spinulosus

Keratotic spikes that emerge from dilated ostia of infundibula and are equidistant from one another. The term keratosis pilaris refers to the phenomenon when it presents itself without any distinct arrangement of individual lesions, whereas the…

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

Dermatophytosis

An inflammatory process caused by superficial fungi, i.e., fungi situated superficially in the cornified layer and in other cornified structures, and expressed clinically as smooth-surfaced papules, scaly papules, scaly plaques, nodules, pustules,…

Histologic Diagnosis of Inflammatory Skin Diseases

Hair Follicles

…viable epithelium beneath it. Therefore, the outer sheath extends all the way from the bottom of the bulb to the base of the infundibulum. The infundibulum, being epidermis, is continuous with surface epidermis. Soon after a follicle enters the…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

…olliculitis” is a fiction. 10.37.16A: Pustular dermatitis, infundibular + 10.37.16B: Neutrophils in large number in an infundibulum that houses corneocytes arranged compactly and also outside the infundibulum in the reticular dermis +…

Histologic Diagnosis of Inflammatory Skin Diseases

"Folliculitis" (Infundibulitis)

…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 neutrophils in an infundibulum becomes great…

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