PSAMMOMATOID OSSIFYING FIBROMA OF THE PARANASAL SINUSES - AN EXTRAGNATHIC VARIANT OF CEMENTO-OSSIFYING FIBROMA - REPORT OF 3 CASES

Psammomatoid ossifying fibroma (POF) is a diagnostic designation for a sinonasal or orbital fibroosseous lesion characterized by numerous sm all round mineralized spherules lying in a fibroblastic stroma. We rep ort 3 cases. One occurred in the frontal sinus of an 18-years-old male ; 1 in the frontal sinus of a 20-year-old male and 1 in the maxillary sinus of a 36-year-old male. Rather limited excision resulted in a dis ease-free follow-up time from 2 to 6 years. The histomorphology of POF was compared with other fibro-osseous lesions of the craniofacial ske leton including the jaws. It appeared that POF is similar to cemento-o ssifying fibroma occurring in the jaws and the necessity for different names for lesions only differing in their site of occurrence is consi dered to be at least debatable.