Abstract
A 26 years old patient was admitted to hospital with complaints of abdominal pain and febrile temperature. Initially, elevated serum antigen CA-125, ascites and multiple suspicious nodules in the lungs and abdominal cavity on CT were found, thus, diagnosing ovarian cancer. However, after further preoperative examination, the diagnosis of infiltrative pulmonary tuberculosis with extrapulmonary involvement was set, thereby cancelling the surgery. The patient was treated with first-line antituberculosis agents and discharged home. Almost in all other cases, peritoneal tuberculosis is diagnosed only after surgical intervention.