Presentation
Lower back pain and pelvic pain.
Patient Data
Subacute insufficiency fractures of the sacrum (vertical fractures of the bilateral ala and horizontal fracture through the body at S1-2. Subacute insufficiency fracture of the right parasymphyseal pubic bone.
Bone scan demonstrates increased uptake at the sites of fracture. A focus of increased uptake is also seen in the right humeral head.
Right humeral head posterior subchondral lucency with increased uptake on bone scan most in keeping with insufficiency fracture/AVN.
Case Discussion
Subacute sacral and right parasymphaseal insufficiency fractures. The mixed lucent and sclerotic appearance and presence of the right pubic bone lesion may cause the inexperienced reader to misdiagnose this as osseous metastatic disease with pathological fracture, however the fracture distribution is characteristic of insufficiency fracture.