[Endotracheal mantle cell lymphoma: a case report]

Mantle cell lymphoma (MCL) is a subtype of B-cell non-Hodgkin lymphoma, typically diagnosed at an advanced stage with frequent extranodal involvement. Common sites of infiltration include the gastrointestinal tract, eye, liver, spleen, bone marrow, and central nervous system; however, pulmonary involvement-particularly tracheobronchial manifestation-is exceedingly rare. We report the case of a 60-year-old woman presenting with a 4-month history of cough and progressive dyspnea. Chest CT revealed a polypoid mass arising from the left tracheal wall, causing significant luminal narrowing. Under general anesthesia, bronchoscopic biopsy and tumor resection were performed, with histopathological examination confirming MCL.