When characteristic findings as polypoid, intraluminal, and nonobstructive masses are present on image studies, some diagnosis such as spindle cell carcinoma, leiomyosarcoma and lymphoma should be considered first.

• 当在图象学上有特别的发现像是类瘜肉状，腔室内的，非阻塞性的肿块时，一些诊断像是梭状上皮细胞癌，横纹肌肉瘤，淋巴瘤都需作第一考虑。