A rare multiple primary sarcomatoid carcinoma (SCA) of small intestine harboring driver gene mutations: a case report and a literature review - Zhu, Zhu; Liu, Xinyi; Li, Wenliang; Wen, Zhengqi; Ji, Xiang; Zhou, Ruize; Tuo, Xiaoyu; Chen, Yaru; Gong, Xian; Liu, Guifeng; Zhou, Yanqing; Chen, Shifu; et al. (Translational Cancer Research, 2021)