Nasopalatine duct cysts are the most common non-odontogenic cysts that occur in the maxilla. Cholesterol granulomas, on the other hand, are commonly found in patients with chronic middle ear disease, but rarely occur in the paranasal sinuses. We report a rare case of a 30-year-old woman who was treated for a nasopalatine duct cyst and cholesterol granuloma at the same time. The patient complained of sudden nasolabial pressure and right nasal obstruction from three weeks ago. A 3 cm sized cystic mass, diagnosed as a nasopalatine duct cyst, was observed in the maxilla and haziness of the right maxillary sinus suspected of chronic rhinosinusitis was detected by computerized tomography. Marsupialization of the nasopalatine duct cyst was performed through the endoscopic transnasal approach. Solid mass in the maxillary sinus, diagnosed with cholesterol granuloma by pathology after surgery, was completely removed by endoscopic sinus surgery. The patient was followed up for 18 months without any recurrence or complications.

The choanal polyp, originating from inferior turbinate, is known to be extremely rare. We report a case of a 65-year-old woman who was treated for choanal polyp originating from inferior turbinate. She had felt left nasal obstruction for two weeks. In the endoscopic examination, polypoid tissue covered with the mucopurulent discharge was observed filling the left inferior meatus. An ovoid homogenous enhancing lesion in the left posterior nasal cavity around the inferior turbinate was observed on CT and MRI. Endoscopic mass excision with partial inferior turbinectomy was performed under general anesthesia. The pedicle of the polyp was observed on the posterior side of the inferior turbinate. Complete resection including the mucosa around the pedicle of the choanal polyp was performed. The patient was followed up for seven months without any recurrence or complications.