Endobronchial Lipoma in a Young Patient: A Rare and Atypical Case Report.

Endobronchial lipoma (EL) is a rare, benign pulmonary tumor that frequently causes diagnostic delays due to its nonspecific presentation. We report a case of a 32-year-old male chronic smoker who presented with a 15-day history of dry cough and tachypnea. Chest X-ray showed left lower lobe atelectasis. Contrast-enhanced computed tomography revealed a fat-density lesion in the carina on the left side extending into the left main bronchus, causing distal obstruction and left lower lobar collapse. Diagnostic bronchoscopy confirmed a large, pedunculated mass completely occluding the left main bronchus. The mass was successfully resected through electrocautery snare and cryoextraction. Histopathological examination confirmed a well-encapsulated lesion composed of mature adipocytes, consistent with EL. This case highlights the importance of considering EL in patients with obstructive symptoms and demonstrates the efficacy of bronchoscopic resection as the first-line therapeutic intervention.