Introduction: Neoplasmatic diseases during pregnancy are relatively rare, with the incidence of approximately 1/1000 pregnancies. The symptoms of neoplasmatic processes are unspecific and often mirror physiological changes during pregnancy. Chemotherapy is the main therapeutic management of non-Hodgkin lymphomas. The strategy of the treatment and its influence on the course of pregnancy remain controversial. Aim: The aim of this study was to present the case of a pregnant woman with non-Hodgkin lymphoma. Case report: We described the case of a 27-year-old pregnant nullipara with anemia, breathlessness, cough and general weakness with diagnosed diffused large B-cell lymphoma. During pregnancy the patient received six cycles of CHOP chemother...