Juvenile psammomatoid ossifying fibroma of the calcaneus

Abstract

Juvenile ossifying fibromas (JOFs) are a rare group of fibro-osseous lesions, typically of odontogenic origin. Juvenile psammomatoid ossifying fibroma (JPOF) is one variant, that is, histopathologically distinguished by spherical ossicles resembling psammoma bodies. JPOF tumours are most commonly found in craniofacial skeletal structures and can be locally aggressive. Thus, early management by complete surgical excision is crucial for good outcomes, although recurrence is still possible. Secondary aneurysmal bone cyst (ABC) formation has been reported with JOF lesions, but less commonly with the JPOF variant. We describe an unusual case of JPOF that presented in the calcaneus with secondary ABC formation.

Psammomatoid Juvenile Ossifying Fibroma: Case Report

“…Geralmente acomete crianças ou adolescentes, como no caso descrito onde a paciente apresenta 12 anos (Semus;Zielinki;Foster, 2020).…”

“…O FOPJ ocorre frequentemente nos seios paranasais, principalmente no frontal e no etmoide, mas no caso descrito a lesão atingiu toda maxila direita, região infraorbitária em conjunto com assoalho orbitário, fossa nasal, seio maxilar direito, palato e região dentoalveolar (Semus;Zielinki;Foster, 2020).…”

Juvenile psammomatoid ossifying fibroma in paranasal sinuses: A case report and literature review

“…The enhancing characteristics of this bony shell suggested tumor tissue rather than hyperostosis [10] . Solid tumor components usually appear as isointense on T1W sequences and as isointense or hypointense with a central hyperintense region on T2W sequences [ [11] , [12] ]. Post-contrast imaging typically reveals homogeneous enhancement in solid areas and the peripheral rim, in addition to septal enhancement in cystic regions [11] .…”

“…JPOFs with secondary aneurysmal bone cysts (ABCs) have been rarely reported in the literature, associated with 14.8% of JPOFs detected in the maxilla and mandible. Most ABCs have been associated with recurrent JPOFs and not with primary lesions [12] . Secondary ABCs may originate from intra-lesional alternative stroma development or intra-lesional vascular malformation, resulting in the formation of expanding bone cysts.…”

“…Secondary ABCs may originate from intra-lesional alternative stroma development or intra-lesional vascular malformation, resulting in the formation of expanding bone cysts. The presentation of secondary ABCs indicates a poor prognosis, as ABCs are highly aggressive with a high likelihood of recurrence [12] . In this case, the neoplasm consisted of a primary JPOF with no evidence of secondary ABC, which may suggest a low probability of recurrence.…”