Cholesterol granuloma (CG) is a tissue reaction in response to the accumulation of cholesterol crystals rarely found in the maxillary sinus. The etiopathogenesis of maxillary sinus CG remains unclear. We reviewed the literature and added two new reports of cholesterol granuloma in maxillary sinus related to endodontically treated maxillary posterior teeth. The first report refers to a 45-year-o...

Mucoceles of the paranasal sinuses are locally aggressive, cystic, benign lesions. They mainly occur in the frontal or anterior ethmoidal sinuses, and more rarely in the maxillary sinus. Chronic sinus inflammation, trauma, previous surgery and allergic disease are common causes of paranasal mucoceles. Giant mucoceles of the maxillary sinus causing bone destruction are extremely rare in patients...

Meningiomas account for nearly 15% of primary brain tumors, but extracranial meningiomas are very rare. We presented a case of invasive maxillary sinus meningioma. A 50-year-old man presented with facial tenderness and severe pain in the left cheek. He had a prior surgery for a meningioma in the left frontal lobe eight months before. Physical examination and computed tomography showed a mass in...

Ectopic tooth eruption in a non-dental area is a rare entity, whereas in oral cavity it is most common. The ectopic development of teeth in non-dental localizations have been reported in the nasal cavity, chin, maxillary sinus, mandibular bone, palate and orbital cavity. Ectopic tooth eruptions in maxillay sinus are usually asymptomatic and found incidentally during routine clinical or radiolog...