A case of intravascular papillary endothelial hyperplasia in the maxillary sinus

Abstract

Intravascular papillary endothelial hyperplasia (IPEH) is a benign lesion caused by the proliferation of vascular endothelial cells. We report an extremely rare case of IPEH derived from the maxillary sinus.A 52-year-old man visited our department with repeated right epistaxes from a month ago. Nasal endoscopy revealed discharge of blood from the right maxillary sinus ostium. CT and MRI showed a unilateral maxillary sinus mass with irregular edges on the maxillary sinus floor. It was difficult to determine preoperatively whether the mass was malignant or benign because of the lack of accessibility to the lesion for a biopsy.The maxillary sinus mass was resected by the Caldwell-Luc operation for diagnostic treatment. The histopathological diagnosis was IPEH.When IPEH occurs in the maxillary sinus, it may be difficult to distinguish from malignant tumors clinically and radiologically. Thus, it is worth knowing that IPEH is one of the differential diseases of maxillary sinus masses.