Rhinolith describes the pathology which is formed by means of deposition of salts on an organic or inorganic nidus in the nose. A nidus may be endogenous or exogenous. A rinolith may develop on an endogenous nidus such as dried blood clots, desquamated epithelium, dried purulent material, bone fragments and rarely ectopic tooth. A 23-year-old male patient presented to our clinic with one-sided nasal obstruction, nasal discharge and deformity of nose. Anterior rhinoscopy, nasal endoscopy and computed tomography (CT) scan revealed a rinolith in the right nasal cavity. In this case, preoperative CT scan and postoperative histological examination revealed that the nidus of the rhinolith was an intranasal ectopic tooth. We herein discuss ectopic tooth as a rare cause of rhinolithiasis. (C) 2006 Elsevier Ireland Ltd. All rights reserved.