皮脂腺增生是皮肤内正常皮脂腺增大所致，属于良性病变。外伤和局部慢性炎症刺激可能与皮损形成有关。可分为早熟性皮脂腺增生和老年性皮脂腺增生。组织病理表现为成熟的皮脂腺小叶的数量的增多。
sebaceous gland hyperplasia,sgh 皮脂腺增生( sebaceous gland hyperplasia,sgh)是表皮附属器肿瘤中向皮脂腺分化的一种特殊的错构瘤。
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患者女，24岁，面部大量痤疮后瘢痕，以“火山口样”及“冰晶样”萎缩性瘢痕为主，同时伴皮脂腺增生。
Female patient, 24 years old, with a large number of acne scar on her face, which are mainly "volcano-like" and "ice-like" atrophic scars, while accompanied by sebaceous hyperplasia.
组织病理学改变主要是基底细胞样细胞增生，向毛囊及皮脂腺导管分化。
Histopathologic change showed mainly that basal cell like cells hyperplasia and the cells differentiated to hair follicle and sebaceous gland ducts.
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