Primary pulmonary invasive mucinous adenocarcinoma with sigmoid colon metastasis:a case report and literature review

Abstract Background: Invasive mucinous carcinoma is a very rare tumor. The colonic metast-asis of IMA is more infrequent. So far, no literatures are published. Case presentation: We report a case of a patient with invasive mucinous adenocarci-noma. After serial months of chemitherapy, the sigmoid colonic metastasis was detected.Conclusions: Symptoms and CT findings can initially be subtle, histological examination remains the gold standard for the definitive diagnosis. Patients with high grade primary lung cancer may have gastrointestinal metastases, therefore their gastrointestinal should be examined to allow early detection and treatment.