title: Fibrous xanthoma of the frontal sinus.
abstract: Frontal sinus mucocele was our preoperative diagnosis in a patient who had frontal swelling and downward displacement of the eye. Supporting this were typical roentgenogram changes, a long history of asthma, pansinusitis, and previous multiple-polypectomy surgery. Frontal sinus exploration revealed a locally eroding lesion. It was composed of spindled cells and lipid-laden histiocytes with a pattern of fibrous xanthoma and was treated conservatively. It should not be confused with true malignancies such as fibrous histiocytoma having a similar histopathologic appearance and requiring more aggressive surgical treatment.
mesh_terms: D005350:Fibroma / Q000473:pathology*; D005626:Frontal Sinus / Q000473:pathology*; D006644:Histiocytes / Q000473:pathology; D006801:Humans; D008297:Male; D008875:Middle Aged; D010255:Paranasal Sinus Neoplasms / Q000473:pathology*