胃原发性非霍奇金淋巴瘤与进展期胃癌的CT鉴别诊断

目的：探讨CT在胃原发性非霍奇金淋巴瘤与进展期胃癌鉴别诊断中的价值。方法：回顾性分析经手术病理证实的15例胃原发性非霍奇金淋巴瘤和22例进展期胃癌患者的病例资料,观察病变部位、形态、胃周径浸润范围、病灶最大厚度、坏死形态、病变强化程度及强化方式、浆膜面浸润、其它脏器浸润及腹部淋巴结转移情况等并进行对比分析。结果：胃原发性非霍奇金淋巴瘤胃壁厚度1.0～4.3cm（平均2.0cm）,增强后动静脉期较平扫CT值分别提高10和20HU;胃壁完整10例,胃壁环周浸润3例,周围淋巴结肿大（直径〉1.0cm）3例,腹腔少量积液2例。进展期胃癌胃壁厚度0.7～3.7cm（平均1.8cm）,增强后动静脉期分别较平扫CT值提高20和40HU;胃壁溃疡17例,胃壁环周浸润3例,周围淋巴结肿大8例,其中2例伴钙化,腹腔大量积液3例、少量积液2例,腹腔脏器转移4例。两组病例均可出现胃周、肾门下腹膜后区淋巴结肿大。结论：CT在胃原发性非霍奇金淋巴瘤与进展期胃癌的鉴别诊断中有重要的价值。胃壁僵硬伴明显强化、浆膜外脂肪浸润、淋巴结肿大钙化、大量腹水及脏器转移等常提示胃癌的诊断;而胃壁增厚但柔软,伴轻度～中度均匀强化有助于胃原发性非霍奇金淋巴瘤的诊断。

CT in the Differential Diagnosis of Primary Gastric Non-Hodgkin Lymphoma and Advanced Gastric Cancer

Objective:To evaluate the value of CT in the differential diagnosis of primary gastric non-Hodgkin lymphoma (NHL) and advanced gastric cancer.Methods:CT images of 15 patients with primary NHL and 22 patients with advanced gastric cancer were retrospectively analyzed.All of the patients had pathology diagnosis.CT appearances included location,appearances of tumor,infiltration of stomach circumference,thickness of the lesion,pattern of necrosis,degree and pattern of enhancement,infiltration of serosa,invasion...