Bladder Lymphoma. Presentation of clinical case

Introduction: lymphomas develop in lymphoid tissue located in lymph nodes and in dissimilar organs of the human body. They are malignant tumors located in the lymphoid tissue with a low incidence in the genitourinary tract as the primary site; among them, those of the bladder are uncommon. Primary bladder lymphomas present an indistinguishable clinical-radiological pattern, of solid growth and with characteristics similar to urothelial carcinoma. Objective: to present a clinical case, with a diagnosis of primary bladder lymphoma treated in the Oncology service of the “Abel Santamaría Cuadrado” General Teaching Hospital in Pinar del Río. Case presentation: patient, 58 years old, male, white, relative health history; In February 2020, he went to the clinic due to bleeding in his urine, urinary urgency, droplet urination, as well as weight loss of more than 15 lbs. and evening fever. He was evaluated by the urology service, which suspected urothelial carcinoma of the bladder, which led to a systematic diagnosis that determined infiltration of the bladder wall by intermediate B cell non-Hodgkin lymphoma. Conclusions: the diagnosis in these cases is determined by immunohistochemistry studies and tumor monoclonality demonstrated by molecular biology techniques. Primary bladder lymphomas have a solid growth pattern similar to that of urothelial carcinoma. The choice for treatment consists of a regimen consisting of CHOP chemotherapy (cyclophosphamide, vincristine, prednisone, doxorubicin) combined with the anti-CD20 monoclonal antibody rituximab. We present a case of infradiaphragmatic intermediate B cell non-Hodgkin lymphoma with extralymphatic involvement of the bladder