Ossifying fibroma: a rare cause of orbital inflammation.
OBJECTIVE
To describe the clinical and radiologic features of 4 cases of ossifying fibroma affecting the orbit and to review the literature on orbital involvement by the tumor.


METHODS
Small case series.


RESULTS
Four patients (3 children and 1 adult) with ossifying fibromas invading the orbit were examined. Two of the 3 children were examined for ossifying fibromas on the orbital roof. One had the psammomatoid form of the disease and the other the trabecular variant. Despite striking differences in the histologic pattern and in the radiologic appearance of the lesions, both children displayed a significant degree of orbital inflammation mimicking orbital cellulitis. The third child and the adult patient had the orbit involved by trabecular ossifying fibromas invading the orbital floor. The tumor of the adult clearly originated in the maxilla, filled the maxillary sinus, and eroded the orbital floor. The tumor of the third child occupied the maxillary, ethmoid, and sphenoid sinuses. In both cases, the clinical presentation was painless eye dystopia and proptosis.


CONCLUSIONS
Regardless of the histologic pattern (trabecular or psammomatoid), ossifying fibromas can induce a substantial degree of orbital inflammation in children and must be included in the differential diagnosis of acute orbital inflammation during childhood.
Cruz
Antonio A V
AA
Department of Ophthalmology, Otorhinolaryngology and Head and Neck Surgery, School of Medicine of Ribeirão Preto - University of São Paulo, Ribeirão Preto, Brazil. aavecruz@fmrp.usp.br
Alencar
Victor M
VM
Figueiredo
Ana Rosa P
AR
de Paula
Sheila
S
Eichenberger
Gustavo C D
GC
Chahud
Fernando
F
Pedrosa
Moisés S
MS
D000293:Adolescent; D002648:Child; D005094:Exophthalmos / Q000209:etiology; D005260:Female; D018214:Fibroma, Ossifying / Q000150:complications* / Q000000981:diagnostic imaging / Q000473:pathology; D006801:Humans; D008297:Male; D008875:Middle Aged; D009361:Neoplasm Invasiveness; D054517:Orbital Cellulitis / Q000000981:diagnostic imaging / Q000209:etiology* / Q000473:pathology; D009918:Orbital Neoplasms / Q000150:complications* / Q000000981:diagnostic imaging / Q000473:pathology; D011859:Radiography