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男,50岁,声嘶半年,右侧声带肿物大小1*0.8cm
本例图片采用麦克奥迪MoticBA410显微镜+MoticPro285A摄像头采集制作。
点评专家:刘红刚(38楼 链接:>>点击查看<< )
获奖名单:Renghis(6楼 链接:>>点击查看<< )
Inflammatory Myofibroblastic Tumor
The characteristic histologic finding is an unencapsulated,loosely organized proliferation of spindle-shaped cells in a myxoid or fibrous vascular background stroma, with variable inflammatory cells and occasionally collagen deposition and calcifications.A storiform to fascicular pattern may be seen. The myofibroblasts have round to oval nuclei with dense chromatin (and an often prominent nucleolus), surrounded by ample cytoplasm and frequently with long cytoplasmic extensions (“tadpole cells”; see figure 1). Remarkable atypia may be seen, but the cells generally maintain a normal nuclear-to-cytoplasmic ratio. Mitotic figures may be seen, but they are not increased or atypical.
The inflammatory infiltrate is inconstant and includes lymphocytes,plasma cells, histiocytes, and eosinophils. The proliferation respects the surface epithelium and surroundingmesenchymal tissues.
huanghuang 离线
诊断:(右侧声带肿块)炎性肌纤维母细胞瘤(IMT)
诊断依据:(1)老年男性,病变部位右侧声带;
(2)肿瘤位于鳞状上皮下,表面鳞状上皮乳头状增生,局部伴有轻度不典型;
(3)瘤细胞有疏松排列梭形细胞组成,局部呈束状,其间混有少量的淋巴细胞、嗜酸性粒细胞及中性粒细胞;间质血管丰富,呈狭窄的裂隙样,局部细胞有异性,核分裂样像易见到。
(4)瘤细胞呈梭形至星形,核增大呈椭圆形,有突出的核仁和丰富的细胞质,局部细胞呈轴索样;未见到明确坏死;
(5)总的特点类似于一个反应性的过程。
免疫组化:Vimentin、S-100、CD68、HMB45、Myo-D1、CD34、AE1/AE3、CK高、CK低、CK5/6、Desmin、ALK、cyclinD1、Ki-67
鉴别诊断:(1)棘层分解型鳞状细胞啊癌:CK高、CK广均阴性能除外上皮源性肿瘤;
(2)无色素性恶性黑色素瘤:HMB45、S-100阴性能除外;
(3)多形性横纹肌肉瘤:发生于喉部位的相当罕见,免疫组化Myo-D1阳性;
(4)肉芽肿性炎:需结合病史
(5)假肉瘤型肌纤维母细胞增生:细胞无明显异型性,核分裂像少见;
(6)其他类型间叶源性肿瘤: