小肠间质瘤的影像学特点分析

目的分析小肠间质瘤的影像学表现，提高对本病的认识。方法回顾性分析23例经手术病理证实的小肠间质瘤患者的影像学资料，常规钡餐检查11例，小肠造影2例，数字减影血管造影检查2例，超声检查13例，CT检查23例。结果肿瘤发生于十二指肠5例，空肠11例，回肠8例，其中空肠多发1例，空回肠多发1例。上消化道钡餐检出2例，小肠造影检出3例，数字减影血管造影检出2例，B超检出12例，CT检出21例。CT检查病灶多呈圆形或类圆形、等低混杂密度（17例），少数呈均匀等密度（4例）或囊性低密度（2例）。增强CT检查病灶多有明显强化，均匀强化3例，不均匀强化18例。结论小肠间质瘤在影像学检查上有一定的特征，包括边界光整、富于血供、淋巴转移少见和临床症状较轻等，其中，B超和CT检查是小肠间质瘤主的要影像学检查手段，最后确诊须依靠免疫组化和电镜检查。

Imaging features of gastrointestinal stromal tumor

Objective To improve our knowledge by analyze the image findings of stromal tumor at small intestine.Methods The image findings in 23 cases with pathological-proved small intestinal stromal tumor were retrospectively analyzed as follow:image examine with GI(11 cases),DSA(2 cases),B-us(13 cases) and CT(all cases).Results The tumors originated from the duodenum(n=5),jejunum(n=11) or ileum(n=8).Found by GI(n=2),DSA(n=2),B-us(n=12) and CT(n=21).The lesions were mainly round or oval in shape.On plain CT scans,the tumors showed low-density centrally with isodensity peripherally(n=17),or homogeneous isodensity(n=4),or cystical low-density(n=2).On enhanced CT scans,moderate or marked enhancement was seen in most cases.Conclusion It has some spacial findings by image examination about small intestinal stromal tumor,include:well-defined margins,markedly enhancement,no metastases to local lymph nodes and the common clinical symptoms.CT and B-us are the mainly examination,therefore,a confirmed diagnosis relies on the pathological examination.