Analysis of clinical characteristics and prognosis of 68 patients with primary pulmonary choriocarcinoma

Primary pulmonary choriocarcinoma (PPC) is a highly malignant intrapulmonary tumor with a notorious prognosis. Few clinical studies have been undertaken to investigate the clinical characteristics and prognosis of PPC. We systematically conducted a retrospective analysis of patients with PPC in the literature published in PubMed and CNKI databases until March 31, 2022. The primary outcome was all-cause mortality. Survival curves were depicted using the Kaplan‒Meier method and compared using the stratified log-rank test. A Cox proportional hazards model was used to estimate the prognostic factors. A total of 68 patients were included, which consisted of 32 females and 36 males, with an average age of (44.5 ± 16.8) years old, ranging from 19 to 77 years. The clinical characteristics were mostly cough (49.2%), dyspnea (22.2%), hemoptysis (39.7%) and chest pain (39.7%). Kaplan‒Meier analysis showed that sex, age, hemoptysis, metastasis and treatment combining surgery with chemotherapy had a significant effect on survival. There were no effects on other outcomes. Furthermore, univariate and multivariable Cox regression analyses showed that the impact of the treatment combining surgery with chemotherapy on OS showed independent prognostic significance. PPC is a rare disease that lacks specific clinical features. Early diagnosis with optimal management is a significant goal. Surgery followed by adjuvant chemotherapy may be the best treatment for PPC.