Rationale: Pyothorax-associated lymphoma (PAL) is a rare kind of malignant pleural lymphoma. adopt rituximab with cyclophosphamide, vincristine, and prednisone chemotherapy without anthracyclines. Final results: The procedure effect was apparent after one routine of chemotherapy. The patient’s pleural and pericardial effusions had been significantly reduced. Using the chemotherapy process above followed, on Oct 25 pleural and pericardial effusions didn’t upsurge in multiple reexaminations, 2015, 15 February, 2016, august 10 and, 2016. Lessons: Analytical analysis uncovered that chemotherapy with rituximab can raise the comprehensive remission rate of non-Hodgkin lymphoma, reduce the possibility of failure and relapse, and prolong disease-free and overall survival. Moreover, there is no significant increase in adverse drug reactions compared with the effect of chemotherapy with CHOP alone. In the case of this patient, chemotherapy with rituximab was safe and efficacious. Keywords: nosogenesis, pyothorax-associated lymphoma, rituximab 1.?Introduction Pyothorax-associated lymphoma (PAL), a rare kind of malignant pleural lymphoma and closely related to chronic pyothorax (especially caused after tubercle bacillus contamination), was first discovered in Japan and now has the highest morbidity rate.[1] There have been reports of PAL in Europe; however, APS-2-79 HCl few cases have been reported in China. In 2004, the World Health Organization recognized PAL as a separate type Sstr1 of diffuse large B-cell lymphoma (DLBCL). Additionally, by researching PAL cases, EpsteinCBarr computer virus (EBV) contamination has an important bearing around the development of the disease. For many patients with PAL, the evidence of EBV contamination can be noted.[1] According to literature, most diagnoses of PAL cases were suspicious.[2] The diagnoses are often grounded on 3 clinical features that patients are with a history of tuberculosis, a pathologic type of DLBCL (showed by the pathology of pleural and pericardial effusions), and an evidence of EBV contamination. The characteristics of this individual are different from those reported in most cases. PAL is commonly seen in chronic tuberculosis or tuberculous pleurisy. Most lymphomas are discovered about 20 to 50 years after tuberculosis contamination, whereas for this individual tuberculosis and lymphoma were diagnosed concurrently. Moreover, in most PAL cases, a biopsy of pleural masses can help confirm lymphoma. However, the patient’s imaging did not suggest a pleural nidus. The patient was then examined with pleural and pericardial effusion smears, as well as cell morphology and immunohistochemistry of cell sediment sections. 2.?Case statement The patient, a 76-year-old male, was admitted to our hospital on March 13, 2015 due to recurrent shortness of breath after activities for over 2 years, which became more serious when it manifested with edema of APS-2-79 HCl lower limbs 1 day previously. The patient suffered from: cardiovascular system disease with unpredictable angina pectoris, triple-vessel disease, and long lasting atrial fibrillation, and an risky 3rd degree high blood circulation pressure extremely. With factor of the chance of inadequate cardiac APS-2-79 HCl functions, the individual was admitted towards the Cardiovascular Section for heart failing treatment. Examinations upon entrance uncovered shortness of breathing, thick breathing noises both in lungs, reduction in breathing noises on both bottom level sides from the lungs, few moist and dried out rales, no pleural friction noises. The apical pulse moved left slightly; the boundary of cardiac dullness extended to the proper and still left, with a heartrate of 120 beats per arrhythmia and minute. Within the aortic valve, 3/6-level diastolic respiratory murmur could be heard within the still left armpit, without pericardial fricative audio. The related examinations had been improved following the patient’s entrance to our medical center. Myocardial markers, cardiac enzymes, and B-type human brain natriuretic peptides didn’t increase. Temporarily, the outward symptoms are not regarded as due to cardiac insufficiency. The upper body computed tomography (CT) evaluation revealed that there have been pleural effusions on both edges, plus some extent of compressive atelectasis in the two 2 lower elements of the swollen lungs, without.