Chen Zhihua, Liang Wenjie
Department of General Surgery, the First people's Hospital of Taicang City, Taicang Affiliated Hospital of Soochow University, No. 58, Taicang, Suzhou, 215400, China.
Department of Radiology, the First Affiliated Hospital, College of Medicine, Zhejiang University, 79# Qingchun Road, Hangzhou City, Zhejiang Province, 310003, China.
BMC Cancer. 2017 Feb 20;17(1):143. doi: 10.1186/s12885-017-3146-3.
Myopericytoma is a rare and usually benign tumor, which is even rarer if it occurs in the liver and stomach space. Previous reports of myopericytoma were mostly related to its pathological manifestations, while imaging reports were rare. Here, we report the computed tomography (CT), computed tomography angiography (CTA) and magnetic resonance imaging (MRI) performance for one deep myopericytoma.
In this study, one deep myopericytoma in the liver and stomach space is reported. A CT that was not contrast-enhanced showed a lobulated tumor with heterogeneous density, and a contrast-enhanced CT showed that the mass had progressive enhancement. CTA showed that the blood-supply of the tumor was supplied by the anterior superior pancreaticoduodenal artery and the left gastric artery. An MRI showed the lesion had isointensity on T1-weighted imaging (T1WI) and slight hyperintensity on T2-weighted imaging (T2WI). The lesion MRI enhancement characteristics were similar to the characteristics from the contrast-enhanced CT. In this case, the enhancement pattern of the tumor was the centrifugal enhancement for both the contrast-enhanced CT and MRI. After surgical resection of the tumor, the pathological diagnosis was myopericytoma, and there was no recurrence in a short-term follow-up.
The myopericytoma generally has a rich blood supply. When there is necrosis in the center lesion, the lesion has peripheral enhancement. Abdominal myopericytoma could be categorized as having centrifugal enhancement.
肌周细胞瘤是一种罕见的通常为良性的肿瘤，若发生于肝胃间隙则更为罕见。既往关于肌周细胞瘤的报道大多涉及其病理表现，而影像学报道较少。在此，我们报告一例深部肌周细胞瘤的计算机断层扫描（CT）、CT血管造影（CTA）及磁共振成像（MRI）表现。
本研究报告一例发生于肝胃间隙的深部肌周细胞瘤。平扫CT显示为分叶状肿瘤，密度不均匀，增强CT显示肿块呈渐进性强化。CTA显示肿瘤血供由胰十二指肠上前动脉和胃左动脉提供。MRI显示病变在T1加权成像（T1WI）上呈等信号，在T2加权成像（T2WI）上呈轻度高信号。病变的MRI强化特征与增强CT表现相似。在该病例中，增强CT和MRI的肿瘤强化方式均为向心性强化。肿瘤手术切除后，病理诊断为肌周细胞瘤，短期随访无复发。
肌周细胞瘤一般血供丰富。当病变中心出现坏死时，病变呈周边强化。腹部肌周细胞瘤可归类为向心性强化。
