肥胖是一种以慢性低度炎症为特征的进展性疾病,与多种代谢性疾病的发生、发展密切相关。脂肪组织作为一种内分泌和免疫器官,可分泌多种生物活性物质及炎症因子,参与肥胖患者体内的代谢过程。减重手术是治疗病态性肥胖及相关代谢性疾病的有效方法之一,能够调节机体内的炎症反应、有效改善代谢状态。但减重手术对于炎症因子的作用如何,目前国内外的文献证据仍有争议。本文将系统阐述肥胖与代谢性炎症的关系以及减重手术对炎症因子的影响,旨在为肥胖代谢外科的诊疗过程提供参考。

Obesity is a progressive disease characterized by chronic low-grade inflammation,which is closely related to the occurrence and development of a variety of metabolic diseases．As an endocrine and immune organ,adipose tissue can secrete a variety of bioactive substances and inflammatory factors,which participate in the metabolic process of obese patients．Bariatric surgery is one of the effective methods for the treatment of morbid obesity and related metabolic diseases,which can regulate the inflammatory response in the machine and effectively improve the metabolic state．However,the effect of bariatric surgery on inflammatory factors is still controversial at home and abroad．This article will systematically explain the relationship between obesity and metabolic inflammation and the effect of bariatric surgery on inflammatory factors,aiming to provide a reference for the diagnosis and treatment process of bariatric surgery．

目的 探讨小于4 cm的胃神经鞘瘤（GS）的CT误诊与漏诊原因,从而加深影像科医师对GS的认识,提高其CT检出率及诊断准确率。方法 回顾性分析2019年3月—2022年10月经手术切除及病理证实的10例小于4 cm的GS患者的临床、CT及病理资料。在CT图像上评估肿瘤的位置、大小、形态、密度、强化特点及周围淋巴结等情况。结果 术前CT误诊7例,漏诊2例,仅1例正确诊断;10例病灶均起源于胃黏膜下;9例为圆形或类圆形;7例发生于胃体;平扫密度均低于肌肉组织,均呈渐进性强化。结论 小于4 cm的GS术前误诊率很高,且可发生漏诊。当CT检查提示胃体部黏膜下圆形或类圆形占位病变,平扫呈均匀稍低密度,增强呈渐进性强化时应考虑GS的可能,最终确诊需病理及免疫组化检查。

Objective To investigate the causes of CT misdiagnosis and missed diagnosis of gastric schwannomas（GS）smaller than 4 cm in size,and to improve radiologists’ awareness of GS and increase the detection rate and diagnostic accuracy．Methods Clinical,pathological and CT data of ten surgically and pathologically confirmed GS patients were retrospectively reviewed between March 2019 and October 2022．The location,size,shape,attenuation,enhancement features and surrounding lymph nodes of each tumor on CT were analyzed．Results Of the 10 patients,7 cases were misdiagnosed in preoperative CT examination,two cases were missed diagnosed and only one case was correctly diagnosed．All tumors originated from the submucosa in ten cases,and nine cases showed a round or oval shape．Seven lesions were located in the gastric body,and all tumors had homogeneous low attenuation compared to muscle on plain CT images．All cases displayed mild-moderate to obvious enhancement．Conclusions GS smaller than 4 cm have a high rate of misdiagnosis and missed diagnosis preoperatively．When CT examination indicates a submucosa tumor with a round-like shape in the gastric body and homogeneous mild hypoattenuation on plain CT,the possibility of GS should be raised．Pathological and immunohistochemical examinations are necessary to confirm the final diagnosis．