Interventional treatment of right lower lobe bronchial schwannoma under bronchoscopy: A case report and literature review.

Bronchial schwannoma is a rare benign tumor traditionally managed through surgical resection. This case report describes a 69-year-old Chinese woman with an asymptomatic bronchial schwannoma incidentally discovered during routine health check-up. Computed tomography (CT) and bronchoscopy revealed a broad-based mass (27 mm × 16 mm) at the right lower lobe bronchus, causing complete obstruction of the dorsal segment and severe stenosis (>80%) of the basal segment. Histopathological and immunohistochemical analyses confirmed the diagnosis of schwannoma. The patient underwent a single-session multimodal bronchoscopic treatment combining cryotherapy, high-frequency electrocoagulation, and laser therapy, with minimal bleeding (<5 ml). Post-intervention evaluation showed a fully patent right lower lobe bronchus, and at 8-month follow-up, CT confirmed complete resolution without tumor recurrence. This case demonstrates that carefully planned bronchoscopic intervention can effectively manage selected cases of bronchial schwannoma while preserving lung function and minimizing procedural risks.