Ossifying Fibromas (A report of four unusual cases)

A case of ossifying fibroma of the parietal bone.

“…The ossifying f ibroma leads to a variety of clinical symptoms (Hiranandani et al 1966). In those cases in which the tumor appeared in the cranial vault, as reported here, it is common that the tumor is detected by chance because of its painlessness.…”

“…This tumor has also been reported in the mandible and maxilla of the young adult (Hiranandani et al 1980;Marvin et al 1958;Montgomery, 1927;Schwarz et al 1964;Sherman et al 1948;Smith et al 1952). However, on rare occasions, it may appear to be circumscribed solely to parts of the cranial vault such as the frontal (Hiranandani et al 1966;Thomas et al 1966), temporal (Kuratsu et al 1985), parietal (Feiring et al 1957;Shishido et al 1982;Takeuchi et al 1962), and occipital bones (Yamashita et al 1977). There are only 9 previously reported cases involving the cranial vault alone.…”

“…The paranasal sinuses, the frontal and ethmoid bones, and the orbital roof are also predilection sites (Feiring et al 1975;Hiranandani et al 1966;Marvin, 1958;Montgomery, ;927;Schwarz, 1964;Scott et al 1971;Smith et al 1952). However, in very few cases, an ossifying f ibroma is observed to be circumscribed solely to parts of the cranial vault such as the temporal (Kuratsu et al 1985), parietal (Seitz et al 1965;Shishido et al 1982;Takeuchi et al 1962) and occipital bone (Yamashita et al 1977), as well as to parts of the frontal bone other than the sinuses and the orbital roof (Hiranandani et al 1966;Thomas et al 1966). The present report concerns a case of ossifying f ibroma which appeared in the left parietal bone of a 19year-old man.…”