Paraneoplastic syndromes in patients with primary malignancies of the head and neck. Four cases and a review of the literature.

Paraneoplastic syndromes rarely affect patients with head and neck cancer. Four patients with different histological types of head and neck cancer are presented in which the primary malignancy was preceded and/or accompanied by a paraneoplastic syndrome. In the first patient erythrodermia preceded the diagnosis of a nasopharyngeal carcinoma. The second patient presented with a B cell lymphoma of the nasopharynx in association with the syndrome of inappropriate secretion of arginine vasopressine (Schwartz-Bartter syndrome). In the third patient paraneoplastic polyarthritis had been diagnosed 5 months before a hypopharyngeal carcinoma was diagnosed. In the last patient the paraneoplastic anti-Hu positive encephalomyelitis was associated with a primary malignancy in the larynx with neck metastases. Diagnostic procedures, treatment and follow-up of these patients are reported and accompanied by a review of the literature.