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Spindle Cell Lipomas in Women: A Report of 53 Cases.

女性梭形细胞脂肪瘤:53例报道

Ko JS,Daniels B,Emanuel PO,Elson P,Khachaturov V,McKenney JK,Goldblum JR,Billings SD

Abstract

Spindle cell lipomas (SCL) are typically tumors of the upper back/neck (shawl region) of men (80% to 90%). In general, there is a frequent tendency to restrict the diagnosis to this specific clinical scenario and a hesitancy to diagnose SCL in women. We hypothesized that SCL in women have a more varied presentation. A total of 395 SCL were diagnosed at our institution over the last 11 years. The diagnosis of SCL in women was confirmed by re-review. Immunohistochemical stains for CD34, desmin, estrogen receptor, and p16 were performed. In a subset, fluorescence in situ hybridization to detect Retinoblastoma1 (RB1) gene deletion was performed. Of 395 SCLs, 331 (86%) occurred in men; 53 (14%) occurred in women (11 cases excluded). Of the 64 SCL in women, 58 had available material. In total, 53 of 58 were confirmed as SCL. Women were younger at diagnosis (median, 51 y; range, 5 to 76 y) compared with men (64 y; range, 23 to 98 y), P<0.0001, t test. SCL in women typically occurred outside the shawl distribution (36/53, 68%) compared with men (95/331, 29%) (P<0.001), including extremities (16/53, 30% vs. 32/331, 10%) and face (11/53, 21% vs. 47/331, 14%). Dermal SCL in women were also relatively common (16/53, 30%). The cases demonstrated varying proportions of bland spindled cells, ropey collagen, myxoid matrix, and adipocytes. By immunohistochemistry, 46/46 were CD34, 48 of 48 were desmin negative, 33 of 42 were estrogen receptor negative, and 29 of 42 had loss of p16 expression. In total, 12 of 14 showed RB1 loss by fluorescence in situ hybridization. SCL in women frequently occurs in unconventional locations and in at a slightly younger patient age.

摘要

梭形细胞脂肪瘤(SCL)最常发生上背部和颈部,80%-90%为男性患者。由于特殊的男性好发倾向,诊断女性SCL时常常表示迟疑。作者推测女性SCL可能有不同的临床表现。在过去11年中,作者单位一共诊断了395SCL。通过回顾性复习,确诊发生在女性的SCL。免疫组化染色检测CD34desmin、雌激素受体和p16蛋白的表达情况。部分病例通过荧光原位杂交技术检测视网膜母细胞瘤-1RB1)基因缺失情况。395SCLs患者,男性331例占86%,女性53例占14%(排除了另外的11例)。64例女性SCL中,58例可获得有用资料。58例中53例确诊为SCL诊断时女性患者年龄较男性患者年轻,女性发病年龄5-76(中位发病年龄51岁),男性发病年龄23-98岁(中位发病年龄64岁),T检验P<0.000168%36/53)的女性SCL通常发生在颈肩外部位,而仅29%95/331)的男性SCL发生在颈肩外部位(P<0.001),包括肢体末端(女性16/5330% VS男性32/33111%)和面部(女性11/5321% VS 47/33114%)。女性皮肤SCL也相对常见(16/53,30%)。这些病例由温和的梭形细胞、绳索状胶原纤维、黏液样基质和脂肪细胞按不同比例构成。免疫标记显示:46/46 CD34+),48/48 desmin-),33/42 ER-),29/42 p16失表达。荧光原位杂交技术显示12/14RB1丢失。总之女性SCL通常发生在非典型部位,并且发病年龄相对较年轻。


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