鉴别诊断
1 胃间质瘤
• 坏死多见,强化不均匀,具有沿胃壁的垂 直方向生长、瘤体较大但附着点较局限的 特点
• 好发于胃体、胃底,只有约14%发生于贲门, 而位于贲门者只有37%累及EGJ
高剑波,杨学华,孙勇,等.胃间质瘤表现[J].中华放射学杂志,2008,42(12):1283-1286. Yang HK, Kim YH, Lee YJ, et al. Leiomyomas in the gastric cardia: CT findings and differentiation from gastrointestinal stromal tumors.[J]. Eur J Radiol. 2015 Sep;84(9):1694-700.
胃平滑肌瘤的影像学特点:
① 累及EGJ
② 密度及强化均匀,无坏死、钙化
③ 轻度强化(与背部肌肉相比)
④ 长径/短径>1.2(轴位测量)
Lee MJ, Lim JS, Kwon JE, et al. Gastric true leiomyoma: computed tomographic findings and pathological correlation.[J]. J Comput Assist Tomogr. 2007 Mar-Apr;31(2):204-8. Zhu H, Chen H, Zhang S, et al. Differentiation of gastric true leiomyoma from gastric stromal tumor based on biphasic contrast-enhanced computed tomographic findings.[J]. J Comput Assist Tomogr. 2014 Mar-Apr;38(2):228-34.