Immature Heterotopic Ossification Mimicking Metastatic Progression of the Bone Diagnosed by F-18 Fluorodeoxyglucose (FDG) PET/CT

Heterotopic ossification is the calcification of the soft tissues with increased calcium accumulation in that tissue. The imaging characteristics are well defined because it is a well-known documented entity. However the metabolic characteristics are less well known due to the relatively recent development of the PET/CT modality. Previous reports in tissues elsewhere the body confirms that the heterotopic ossification might accumulate FDG and Tc-99m methylene diphosphonate as expected [1,2]. In some special circumstances heterotopic ossification might point out an adjacent malignancy [3]. However the FDG accumulation of the heterotopic ossification of the traumatized bone has not been presented before and this report is the first as a presentation and demonstration of immature heterotopic ossification with FDG accumulation as far as we know in the literature.