纽约食管鳞状上皮癌抗原1在黏液样脂肪肉瘤中的表达及病理诊断价值

Pathological significance of NY-ESO-1 expression in the diagnosis of myxoid liposarcoma

目的探讨纽约食管鳞状上皮癌抗原1(NY-ESO-1)在常见黏液样软组织肿瘤中的表达情况及其在黏液样脂肪肉瘤中的鉴别诊断价值。方法收集2010—2017年青岛大学附属医院和青岛市市立医院存档的黏液样软组织肿瘤石蜡标本43例,采用免疫组织化学EnVision法检测NY-ESO-1的表达,荧光原位杂交(FISH)法检测DDIT3基因状态,逆转录聚合酶链反应(PCR)检测NY-ESO-1 mRNA的表达。结果组织病理学及FISH结果证实本组病例共有11例黏液样脂肪肉瘤和32例其他类型的黏液样肿瘤(包括7例高分化脂肪肉瘤、1例去分化脂肪肉瘤、3例脂肪瘤、2例脂肪母细胞瘤和19例非脂肪源性肿瘤)。免疫组织化学结果显示黏液样脂肪肉瘤中NY-ESO-1阳性表达比例为11/11,阳性部位位于脂肪母细胞的细胞质和细胞核,在具有圆细胞分化的区域表达强度更高。32例其他类型肿瘤中,仅有1例高分化脂肪肉瘤表达NY-ESO-1。在7例(7/11)黏液样脂肪肉瘤和1例(1/7)高分化脂肪肉瘤中检测到NY-ESO-1 mRNA的表达。结论 NY-ESO-1在黏液样脂肪肉瘤表达比例较高,可作为黏液样脂肪肉瘤与其他黏液样肿瘤的鉴别诊断标志物。

Objective To detect the expression of New York esophageal squamous cell carcinoma antigen 1 (NY-ESO-1) in common types of mesenchymal myxoid tumors, and to investigate its significance in the diagnosis and differential diagnosis of myxoid liposarcoma.Methods A total of 43 formalin-fixed paraffin-embedded samples of mesenchymal myxoid tumors from the Affiliated Hospital of Qingdao University and Qingdao Municipal Hospital ranging between 2010 and 2017 were selected. NY-ESO-1 expression was detected by immunohistochemical staining. DDIT3 gene status was detected by fluorescence in situ hybridization (FISH). NY-ESO-1 mRNA was detected by reverse transcription-PCR (RT-PCR).Results Histopathology and FISH results confirmed that there were 11 cases of myxoid liposarcoma and 32 other types (including 7 cases of well-differentiated liposarcoma, 1 dedifferentiated liposarcoma, 3 lipomas, 2 lipoblastomas and 19 non-adipocytic tumors). Immunohistochemical staining showed that the positive expression propotion of NY-ESO-1 in myxoid liposarcoma was 11/11, and the positive location was the cytoplasm and nucleus of lipoblast cells. The expression intensity is higher in regions with round cell differentiation. Among the 32 cases of other mesenchymal myxoid tumors, only one well-differentiated liposarcoma showed positive immunoreactivity for NY-ESO-1. RT-PCR confirmed that 7 cases of myxoid liposarcoma (7/11) and one well-differentiated liposarcoma (1/7) had NY-ESO-1 mRNA expression.Conclusions NY-ESO-1 is positively expressed in myxoid liposarcoma. It can be served as a useful marker for the diagnosis and differential diagnosis of myxoid liposarcoma.