Perioperative Hereditary Angioedema Triggered by Laryngeal Mask Airway: A Case Report and Anesthetic Implications.

Hereditary angioedema (HAE) is a rare condition characterized by episodic subcutaneous or mucosal edema, which may pose significant challenges in the perioperative setting. We report the management of a 79‑year-old male patient undergoing transurethral resection of a bladder tumor under general anesthesia with a supraglottic airway device. Postoperatively, the patient developed acute facial edema requiring prompt recognition and disease‑specific intervention. Rapid resolution was achieved, and the patient had an uneventful recovery. This case underscores the importance of perioperative awareness, early recognition, and careful planning to prevent airway complications in patients with HAE.