Sebaceous glands are present everywhere on the human skin except for the palms, soles, and dorsa of the feet. Generally, they are associated with hair follicles and empty through a short duct into the canal of the hair follicle.1 The sebaceous glands are holocrine glands that produce sebum,...
hair follicle- a small tubular cavity containing the root of a hair; small muscles and sebaceous glands are associated with them Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc. Want to thank TFD for its existence?Tell a friend about us, add...
Sebaceous glands Key points Sebaceous glands are associated both structurally and embryologically with the hair sheath and are usually adjacent to hair follicles, apocrine ducts, and arrector pili muscles, and they often show histologic features of these structures.9 The glands are either unilobular ...
Normal sebaceous glands opened onto the tongue surface in a 28-year-old dentist. A 28-year-old dentist noticed a 9×5-mm yellow submucosal plaque in the midlateral dorsum of his tongue. After a period of observation an excisional biopsy was performed. The histopathologic examination of the ...
Small hair follicles and apocrine glands are often increased in number. Secondary development of other epithelial tumors such as trichoblastoma, syringocystadenoma papilliferum, basal and squamous cell carcinoma is relatively common [1]. We observed a patient who presented with a nevoid lesion ...
Sebaceous carcinoma is a rare, aggressive, malignant tumor derived from the adnexal epithelium of sebaceous glands. It may arise in ocular or extraocular sites and exhibits such a variety of histologic growth patterns and diverse clinical presentations that the diagnosis is often delayed for months to...
Most lesions are of a small size with a diameter of less than 1 cm, although lesions up to 5 cm have been documented. Commonly affected areas are those rich in sebaceous glands, such as the head and neck. Most lesions are asymptomatic and slow growing. Figure 1. Multiple skin-colored ...
Hair follicle-associated sebaceous glands secrete sebum, a highly complex lipid mixture that covers the skin surface and hair shafts. The functional versatility of lipids, combined with the wide array of sebaceous lipid classes and aliphatic moieties, provide mammals with a substrate that facilitates ...
Tumors with sebaceous differentiation range from hyperplasias that resemble normal sebaceous glands to carcinoma that are anaplastic or basaloid. Mature sebaceous elements have multivacuolated cytoplasm; the basaloid cells surround the mature elements in the normal sebaceus gland. The percentage of vacuo...
(1.4) in the area. Often ismore macular at birth, but the papillomatosis increases and sebaceous glandsenlarge at puberty, bringing the patient into the office with a changingbirthmark. When multiple lesions are present, not confined to the scalp, it may be associated with CNS andskeletal ...