胃类癌动态增强CT表现与病理学对照研究

Dynamic Contrast CT Features in Gastric Carcinoid: Comparative Study with Pathological Findings

目的探讨胃类癌的动态增强CT表现与病理学特征。方法回顾性分析经手术病理证实的胃类癌10例,其中典型类癌6例,非典型类癌4例。10例均行平扫及三期动态增强扫描。分析其CT及病理特征,并对部分指标进行统计学分析。结果 10例胃类癌病灶主体全部位于胃底贲门(6例)或胃窦(4例),且以胃后壁或小弯侧者居多(8例)。CT平扫肿瘤多(9例)表现为突入胃腔且密度较均匀的软组织肿块;病灶长径在2.5～6.0 cm之间。3例发生胃周淋巴结转移;3例突破浆膜层出现胃外浸润。CT动态增强扫描肿瘤呈中、重度强化,三期平均CT值分别为64.30 HU、74.30 HU、73.63 HU。结论胃类癌CT表现具有一定特点。CT动态增强扫描对此疾病的定量评估具有重要价值,对鉴别诊断亦有提示作用。

Objective To explore the pathological manifestations and dynamic contrast-CT presentations of gastric carcinoid. Methods Dynamic contrast-CT findings of 10 histologically proved gastric carcinoid cases （6 of typical carcinoid and 4of atypical carcinoid） were analyzed retrospectively. All the 10 cases underwent plain and triphasic dynamic CT enhancement scan. Results Among 10 cases, main bodies of the tumors were located in eardia（ n = 6） or gastric antrum（ n = 4）, and the lesser curvature and posterior wall were more frequently involved （ n = 8 ）. Nine lesions showed homogenous masses in gastral cavity with long axis of 2.5 - 6.0 cm. 3 cases showed peripheral lymphatic metastasis and 3 cases showed infiltration outward stomach. The tumors were moderately or highly enhanced. The average CT values of the three phases dynamic CT scan were 64.30 HU, 74.30 HU, and 73.63 HU respectively. Conclusion Gastric carcinoid has some typicalfeatures on CT images. CT values of dynamic contrast CT examination can analyze masses quantitatively, which is helpful in differential diagnosis.