
病史:患者女,39岁
因上腹胀痛不适伴黑便半月余入院。患者半月余前无明显诱因开始出现上腹胀痛不适,持续性,伴黑便。无畏寒发热、咳嗽咳痰、恶心呕吐、腹泻便秘、无胸痛、心悸、胸闷等不适。
外院胃镜(2015年11月):胃底巨大肿物性质待定合并出血。慢性浅表性胃炎。
大体:

胃肿瘤:灰白暗红碎组织一堆共17cm×17cm×4.5cm,质细,其中可见胃壁组织,已缝合9cm×5.5cm×3.5cm。
大网膜:网膜组织一堆共18cm×17cm×4cm,局部质稍韧、暗红、出血,范围8cm×5cm×4cm。
脾门组织:碎组织一堆共6cm×5cm×1.5cm,切面灰白、灰黄、暗红、稍韧。
脾:脾脏一个9cm×7.5cm×5.5cm,表面被膜完整,脾门部略粗糙,质韧,脾脏切面暗红、均质,未见明显结节。
左肾前组织:不规则组织一块,最大径5.5cm,部分呈囊壁样,厚0.3cm。共十五个蜡块
镜下:卵圆、胖梭形实片状单个核细胞背景中见多量多核巨细胞及异型腺体分布,部分腺体成筛,疏密不一,腺上皮胞浆丰富,核增大,核仁明显,单个核细胞核浆比升高,部分核仁易见,核分裂活跃,见出血及坏死。
IHC:异型腺体:CK、CK7、CK(HMW)、CK(LMW)、CEA均(+),MC局灶(+);
单个核细胞:Vimentin(+)、CD68部分(+);
多核巨细胞:Vimentin(+)、CD68(+);
Syn、CgA均局部(+)(脾门组织);S-100、CD117、Dog1、CD34、CR、SMA、Desmin、ER、HCG、CD30、P63均(-),Ki67(约50%+);
特殊染色:网状纤维染色示网状纤维包绕单个核细胞及异型腺体。
本例特点:
1.本例为中年女性患者,首发症状为肿瘤破裂引胃出血。手术中发现肿物已破裂,胃大小弯及腹膜后未见明显淋巴结肿大
2.组织学显示肿瘤呈双向分化,见形成腺管结构的高分化腺癌和原始间叶细胞弥漫增生形成肉瘤,另见癌的成份见神经内分泌肿瘤分化。
(胃肿瘤)恶性肿瘤,结合形态学及免疫表型,符合伴有破骨细胞样巨细胞的癌肉瘤(高中分化腺癌+未分化肉瘤);
(大网膜)纤维脂肪及胰腺被膜中见癌肉瘤组织;
(脾门组织)见癌肉瘤组织,侵犯神经,局部瘤组织伴神经内分泌分化;
(脾)脾门部纤维组织中见癌肉瘤组织,局部瘤组织侵犯脾实质;
(左肾前组织)纤维组织中见腺癌组织。
文献复习
Carcinosarcoma is a morphologically biphasic tumor comprised of carcinoma and sarcoma components. Gastric carcinosarcoma is rare, and only 56 cases have been reported, mostly in Japan, since the first report by Queckenstadt in 1904. The sarcoma component was considered to be myogenic, rhabdomyoblastic, chondroblastic or osteoblastic in each case reported. Most patients with gastric carcinosarcoma generally have an unfavorable outcome, due to the advanced stage at the time of diagnosis. The mean survival period is 10-15 months.
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