Synchronous occurrence of pulmonary sarcomatoid carcinoma and intrahepatic cholangiocarcinoma: a case report and literature review

Pulmonary sarcomatoid carcinoma (PSC) is a rare histologic subtype of non-small cell lung cancer (NSCLC). The incidence ranges from 0.1% to 4.7% of all lung malignancies. However, Synchronous Intrahepatic cholangiocarcinoma (ICC) with primary pulmonary sarcomatiod carcinoma are much rarer double-cancer. Such a case has not previously been reported till now according to the literature. The coinciding malignancy usually been discovered during surgical exploration. Thus, this is the first report where a targeted biopsy of the clinically suspicious lesion was used to determine the diagnosis of pulmonary sarcomatiod carcinoma concurrent with intrahepatic cholangiocarcinoma. Herein, we present such a rare case and review of the literature.