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Sebaceous adenoma (sebaceous adenoma): causes, symptoms, diagnosis, treatment
Last reviewed: 23.04.2024
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Adenoma of the sebaceous glands (syn: greasy adenoma) occurs usually in the form of a solitary nodule with a smooth surface of a yellowish hue, more often on the skin of the scalp or face, but can have any localization, particularly on the skin of the scrotum. Sexual preference was not observed. Older patients predominate, but observations at young and young age are described. Sometimes the adenoma of the sebaceous glands can appear against the background of the nevus of the sebaceous glands. Occasionally, it can ulcerate, imitating a basaloma in this case.
Pathomorphology. The tumor is located in the dermis in the form of a variety of lobules of different size and shape, delimited from each other by connective tissue layers. Lobules consist of cells of two types - the so-called growth and mature cells of the sebaceous gland. Their ratio can be very different in different parts of the same tumor. Growth cells of small size with a rounded or oval nucleus and a fairly scarce basophilic cytoplasm without signs of fat. Between these cells there are transitional forms. Tumors in which growth cells predominate are less differentiated variants of adenoma of the sebaceous gland.
It is necessary to differentiate first of all from a basalioma with sebaceous differentiation. In the adenoma of the sebaceous gland there are no overgrowths of complexes of small dark cells bordered on the periphery by prismatic epithelium forming palisade structures.
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