(A) Orbital CT shows that the tumor is quasi-circular with homogenous density and clear boundaries; (B) Orbital MRI shows that the tumor is quasi-circular, well-circumscribed and with homogenous intensity. Note the medial rectus and optic nerve is compressed.
入院后完善相关辅助检查,经患者同意后于2018年3月1日在全身麻醉下行右眼眼眶内肿物切除。术中见肿物位于肌锥内,紧邻上直肌、提上睑肌和视神经。病理大体检查:灰白灰红色组织1块,质地较韧,肿物破裂,大小18 mm×17 mm×8 mm,切面灰白色实性。病理检查显微镜下结构:肿瘤细胞呈巢状或围绕血管呈条索状分布,大小一致,圆形或多角形,界限不清,细胞质丰富,嗜伊红性,颗粒感,胞核圆形或卵圆形位于中央,染色质细小,可见核仁结构,间质内含有丰富扩张的毛细血管结构,周围有散在淋巴细胞浸润(图3 )。免疫组织化学检查结果(图4 )示:嗜铬素A(chromogranin A,CgA)(+)、神经元特异性烯醇化酶(neuron specific enolase,NSE)(+)、Ki-67散在(+)、p53少量胞核(+)、CD31、CD34血管壁(+)、波形蛋白血管壁(+)、广谱型细胞角蛋白(cytokeratin CK)(?)、突触素(synaptophysin,Syn)(?)。病理诊断:符合右眼眶副神经节瘤。术后1周出院,眼部检查右眼上睑完全下垂,其他未见明显异常,嘱其定期复诊。1年后复查,右眼上睑下垂症状消失,随访3年,肿瘤无复发。
图3 眼眶副神经节瘤HE染色结果(×400)
Figure 3 HE staining of orbital paraganglioma (×400)
肿瘤细胞的细胞质丰富,嗜伊红性,颗粒感,胞核圆形或卵圆形位于中央,染色质细小,可见核仁结构。
The cytoplasm of tumor cell is rich, eosinophilic, and granular, and the nuclei are round or oval in the center and the nucleolus are clear.
图4 免疫组织化学CgA染色结果(×400)示:肿瘤细胞的细胞质阳性
Figure 4 IHC staining of CgA (×400): the cytoplasm of the tumour cell is positive
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