The CT,MRI and PET-CT findings of spinal osteoblastoma / 实用放射学杂志

ABSTRACT

Objective To illustrate the CT,MRI and PET-CT features of spinal osteoblastoma,and provide an important reference for the preoperative diagnosis and assessment.Methods The imaging and clinical data in 16 cases of spinal osteoblastoma confirmed by surgery and pathology were analyzed retrospectively.Results Age of onset in 11 cases ranged from 10 to 29 years old,5 cases from 30 to 51 years old.Tumors were originated from the spine appendage in 13 cases,and from the vertebral bodies in 3 cases.Tumors presented as expansive bone destruction in 6 cases,and as osteolytic bone destruction in 10 cases.13 cases were diagnosed as benign diseases and 3 cases as invasive ones.Calcification or ossification was seen in all cases,with sclerotic margin of variable thickness and peripheral patchy high density of bone sclerosis.The soft tissue mass was found in 15 cases and intraspinal involvement was showed in 13 cases.The tumors showed isointensity or hypointensity on T 1WI,isointensity or hyper-intensity on T2WI in 13 cases,and showed heterogenous enhancement after contrast administration in 13 cases.PET-CT depicted the nodular or lobulated distribution of radioactive tracer with high radioactive concentration,with increment in standardized uptake value in 5 cases.Conclusion The typical imaging signs of spinal osteoblastoma were expansile,osteolytic bone destruction of the spine appendage,accompanying the soft tissue mass,with a speckled or nodular pattern of calcification or ossification within the lesions.Inhomogeneous signal intensity and inhomogeneous enhancement on MRI and nodular or lobulated high radioactive concentration for the tumors on PET-CT are found.