Ji Jian-song, Lu Chen-ying, Mao Wei-bo, Wang Zu-fei, Xu Min
Department of Radiology, Lishui Central Hospital, The Fifth Affiliated Hospital of Wenzhou Medical College, 289 Kuocang Road, Lishui, Zhejiang, 32300, China,
Abdom Imaging. 2015 Jun;40(5):1164-9. doi: 10.1007/s00261-014-0260-4.
The purpose of this study was to evaluate the computed tomography (CT) imaging characteristics of gastric schwannoma.
Eight cases of gastric schwannomas confirmed by surgery and pathology were retrospectively analyzed by CT. We reviewed the CT findings of gastric schwannomas for the following characteristics: tumor location, size, contour, margin, growth pattern, enhancement pattern, the presence or absence of necrosis, and perigastric lymph nodes.
The tumors were located in the lesser curvature of gastric body (n = 5) and greater curvature of the gastric antrum (n = 3) with a median size of 4.8 cm (range 1.7-11.4 cm). Gastric schwannomas appeared as submucosal tumors with CT features of ovoid (7/8 patients), well-defined (8/8) and exophytic (4/8) or mixed (3/8) growth patterns. On dynamic CT examination, the tumors displayed homogeneous enhancement in seven cases and heterogeneous enhancement in one case. Solid parts of eight tumors demonstrated mild enhancement during the arterial phase and strengthened progressive enhancement during the venous and delayed phases. Two cases had perigastric lymph nodes.
Gastric schwannomas typically manifested as ovoid, well-defined, exophytic, or mixed growth pattern masses on CT. Homogeneous progressive enhancement on dynamic CT is a characteristic finding of gastric schwannoma.
本研究旨在评估胃神经鞘瘤的计算机断层扫描（CT）影像特征。
回顾性分析8例经手术及病理证实的胃神经鞘瘤患者的CT表现。观察胃神经鞘瘤的CT表现，包括肿瘤位置、大小、形态、边界、生长方式、强化方式、有无坏死及胃周淋巴结情况。
肿瘤位于胃体小弯侧5例，胃窦大弯侧3例，中位大小为4.8 cm（范围1.7 - 11.4 cm）。胃神经鞘瘤表现为黏膜下肿瘤，CT特征为椭圆形（7/8例患者）、边界清晰（8/8），呈外生性生长（4/8）或混合性生长方式（3/8）。动态CT检查时，7例肿瘤呈均匀强化，1例呈不均匀强化。8个肿瘤的实性部分在动脉期呈轻度强化，在静脉期和延迟期呈渐进性强化。2例有胃周淋巴结。
胃神经鞘瘤在CT上通常表现为椭圆形、边界清晰、外生性或混合性生长方式的肿块。动态CT上均匀渐进性强化是胃神经鞘瘤的特征性表现。
