[Diagnostic difficulties and errors in neoplasms of the diaphragm].

During 1972-1990 twelve patients with tumors of the diaphragm were operated upon. Age of the patients was from 39 to 60 years. Nine patients had benign tumors and cysts, 3 patients had malignant tumors. Exact nosological diagnosis before operation was not made. Topical diagnostic errors were either due to incomplete volume of examinations or to a refusal of using special roentgen contrast methods.