The Journal of the Korean Bone and Joint Tumor Society  2012;18(1):45-49

doi:10.5292/jkbjts.2012.18.1.45

FDG-PET/CT Complements Bone Scan with Respect to the Detection of Skip Metastasis of Osteosarcoma: A Case Report.

Gi Jeong CHEON ; Jae Gol CHOE ; In Jung CHAE ; Dae Hee LEE ; Sang Heon SONG ; Myo Jong KIM ; Jong Hoon PARK

Keywords

skip metastasis; osteosarcoma; F-18 FDG-PET/CT; bone scintigraphy (BS)

Country

Republic of Korea

Language

Korean

Abstract

Skip lesion is not uncommon feature in osteosarcoma and considered to be importantly associated with poor prognosis factor, and thus, should be excised with the main mass. The accurate pre-operative evaluation of the intramedullary extent of osteosarcoma is essential, because it determines the level of bone resection. Among the reliable detection methods, bone scan has a drawback of high rate of false negative results and regional MRI has a difficulty to cover the whole involved lesions without clinical suspicion. The authors report a case of osteosarcoma of the distal femur with a proximal skip lesion that was not detected by either regional MR imaging or by bone scan, but which was visualized by FDG-PET/CT.