Abstract
Intravascular papillary endothelial hyperplasia (IPEH), or Masson's lesion, is a benign reactive lesion that can be located anywhere in the body, including the head and neck region. Common head and neck locations include the lip, tongue, buccal mucosa, cheek, and parotid, although two cases have been described in the nasal cavity. We present the first case to be described in the paranasal sinuses, in a patient presenting with chronic self-limiting epistaxis. Although the radiographic appearance resembled that of a polyp or cyst, histological analysis demonstrated IPEH. The importance of this lesion lies in its similarity to other vascular lesions, from which it must be distinguished.
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