[A case report of hypopharyngeal carcinoma with multicentric Castleman disease].

Hypopharyngeal carcinoma is the worst malignant tumor in the head and neck squamous cell carcinoma, which has the worst prognosis. As the hypopharynx has a rich lymphatic network, cervical lymph node metastasis is very easy to occur. Castleman disease is vascular follicular lymphnode hyperplasia, a rare chronic lymphoproliferative disease of unknown cause. In the diagnosis of Castleman disease, attention should be paid to the differential diagnosis of head and neck malignant tumors.