AUTHOR=Li Yishan , Zhang Lianru , Yu Huiping , Xin Xiaoyan , He Jian , Yao Yongzhong , Liu Baorui , Li Rutian , Xie Li TITLE=Case Report: Small intestinal metastatic breast cancer: A case report and literature review JOURNAL=Frontiers in Oncology VOLUME=12 YEAR=2022 URL=https://www.frontiersin.org/journals/oncology/articles/10.3389/fonc.2022.900832 DOI=10.3389/fonc.2022.900832 ISSN=2234-943X ABSTRACT=

Breast cancer is considered a malignant tumor with the highest incidence among women and is prone to develop distant metastasis. Small intestinal metastasis of breast cancer, however, is relatively rare. This case report describes a 49-year-old Chinese female patient who presented with small intestinal obstruction and was diagnosed with lobular breast cancer with small intestinal and contralateral breast metastasis. Clinical manifestations, clinicopathological features and potential mechanisms of metastasis, along with diagnosis and treatment, are discussed with a review of the relevant literature. Although small intestinal metastasis is rare in breast cancer, we should keep high alert on the possibility of gastrointestinal metastasis when treating lobular breast cancer patients.