Syndrome of inappropriate antidiuretic hormone secretion associated with oral squamous cell carcinoma

The syndrome of inappropriate antidiuretic hormone secretion (SIADH) is associated with various conditions including malignant disease, particularly small cell lung cancer. It has been reported to occur in 3% of patients with head and neck cancer. Less well known is its association with oral squamous cell carcinoma. This report describes a patient with SIADH associated with recurrent oral sequamous cell carcinoma.