Histologic Diagnosis of Inflammatory Skin Diseases

Topography and Regional Variation

…nd shapes on the undersurface of epidermis at the junction of nipple and areola of a woman. (Courtesy of William Montagna, Ph.D.) Etchings that cover the entire surface of palms and soles, excluding flexion creases, are termed, collectively, “d…

Histologic Diagnosis of Inflammatory Skin Diseases

Muscles

…in abundance in the breast, especially in the vicinity of the nipple, in the labium majus, and in the scrotum, imparting to those anatomic sites distinctiveness histologically. No muscles of hair erection are found in the subcutaneous fat, but muscle…

Histologic Diagnosis of Inflammatory Skin Diseases

Applicable Terms

…ta and lobules are affected equally. PAPULE [L. papula (small nipple)]: A small, i.e., up to 1.0 cm, slightly raised, solid or cystic lesion (Fig. 3.26). A papule may be formed by abnormalities mostly of surface epidermis, as in a plane wart, by chan…

Histologic Diagnosis of Inflammatory Skin Diseases

Hair Follicles

…te, infundibula are unaffiliated with a follicle, namely, the nipple where a lactiferous (apocrine) duct enters directly into infundibula. Cornified cells of infundibula, especially those on the scalp, face, and upper part of the trunk, are host norm…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Breast a Sweat Gland?

…and lactiferous ducts transfer colostrums to the surface of a nipple. It is during lactation that the apocrine nature of those glands is expressed most dramatically in the form of caricature of “decapitation secretion” of the epithelial c…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Origin of Adnexal Neoplasms?

…eir dermal counterparts. They arose in close proximity to the nipple, such as the retroareolar area of the breast and in intimate association with the lactiferous ducts, suggesting an origin from the latter structures.” Nonaka D, Rosai J, Spag…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Cutaneous Horn?

…a describes the appearance histopathologic of any digitate or nipple-shaped proliferation of squamous epithelium; it is not a specific diagnosis. In the arena of cutaneous pathology, it fails to convey whether a lesion is a verruca vulgaris, a seborr…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Dermal Papilla?

…al papilla refers specifically to a single structure, i.e., a nipple-shaped projection of papillary dermis into a hollow on the undersurface of the epidermis. In short, the papillary dermis consists of an upper part, namely, papillae, and a lower par…