A Rare Case of Endotracheal Metastases in Head and Neck Squamous Cell Carcinoma: A Case Report and Literature Review.

Head and neck squamous cell carcinoma (HNSCC) typically originates from the squamous cells lining the mucosal surfaces of the head and neck. Patients may present with diverse symptoms, including hoarseness of voice, difficulty swallowing (dysphagia), a neck mass, or a cough. While metastasis is usually regional, distant metastases, including tracheobronchial involvement, though rare, can occur and are often associated with a poor prognosis.