Summary: we present the case of a 47-year-old male, without any significant history of disease, who was admitted to the pulmonology department with slowly progressing dyspnea. A left pleural effusion was observed. The patient’s epidemiological background, clinical progress and the cytobiochemical analysis of the pleural fluid initially pointed towards a diagnosis of pleural tuberculosis (TB). However, the pleural biopsy done to complete the study confirmed a definitive diagnosis of t-cell lymphoblastic lymphoma.
The patient was transferred to the Hematology department, beginning a chemotherapy treatment after the completion of an extended study. After several complications that arose during said treatment, the patient was released and continues follow-up. He is currently in a state of complete remission.