Small cell neuroendocrine carcinoma of the ethmoid sinuses presenting with generalized seizure and syndrome of inappropriate antidiuretic hormone secretion: a case report and review of literature

Small cell neuroendocrine carcinoma of the paranasal sinuses is extremely rare. We present a case of small cell neuroendocrine carcinoma of the ethmoid sinuses associated with syndrome of inappropriate antidiuretic hormone secretion that resolved after chemotherapy, followed by a review of the literature.