Steatocystoma multiplex - 多发性脂囊瘤https://en.wikipedia.org/wiki/Steatocystoma_multiplex
多发性脂囊瘤 (Steatocystoma multiplex) 是一种良性常染色体显性先天性疾病,导致皮肤出现多个囊肿。囊肿通常直径为2-20 mm,也可达数厘米。它们呈半透明、柔软至坚硬的肿块,内部含有油性黄色液体。

青春期发病常与毛囊皮脂腺单位受到激素刺激有关。囊肿最常见于胸部,也可出现在腹部、上臂、腋窝和面部。在某些情况下,囊肿可能遍布全身。

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  • 在手臂或颈部检查时,它表现为一个小而坚硬的皮下囊肿,通常无症状。
    References Steatocystoma Multiplex 38283021 
    NIH
    Steatocystoma multiplex (SM),也称为脂肪囊肿病或表皮多囊病,是一种罕见的良性皮肤疾病,其特征是皮内出现多个大小不一的皮脂囊肿。临床上,SM表现为大量光滑、坚硬且可移动的囊性肿块,通常无症状。这些病变多为圆形,直径从几毫米到几厘米不等。囊肿表面可能呈淡黄色,深色部分通常与肤色相近。囊内液体无味、油性,透明度和颜色可有差异。与典型囊肿不同,囊肿上方的皮肤中心通常没有可见的开口。SM可出现在身体任何部位,但常见于皮脂腺和毛囊丰富的区域,如躯干、颈部、头皮、腋窝、上肢、下肢和腹股沟。
    Steatocystoma multiplex (SM, also known as steatocystomatosis, sebocystomatosis, or epidermal polycystic disease) is a rare benign intradermal true sebaceous cyst of various sizes. Clinically, SM presents as asymptomatic, numerous, round, smooth, firm, mobile, cystic papules, and nodules. The lesions are uniform, with a size of a few millimeters to centimeters along the long axis. The superficial lesions are yellowish, and deeper lesions tend to be skin-colored. The fluid in SM is odorless, oily, clear or opaque, milky or yellow. The overlying epidermal skin is often normal, with no central punctum. SM can occur anywhere in the body but is more frequently seen in areas rich in pilosebaceous units such as the trunk (especially the presternal region), neck, scalp, axilla, proximal extremities, and inguinal region.
     Steatocystoma multiplex - Case reports 14594591
    一名 25 岁男子出现手臂、胸部和腹部的皮肤问题。20 年来,他一直有无痛性肿块,最初出现在胸部,过去 7 年逐渐扩散至手臂。
    A 25-year-old man came in with a skin condition on his arms, chest, and abdomen. He had been with painless lumps for 20 years, starting on his chest and spreading to his arms over the past 7 years.