[99m Tc] Tc‐MDP bone SPECT/CT diagnosing unstable slipped capital femoral epiphysis with secondary AVN in a patient with misleading knee pain.

Bone scan is highly sensitive whole‐body imaging with relative low radiation in patients with non‐localized skeletal symptoms. Patient is 12‐year‐old boy with Down syndrome, suffering recent claudication and exacerbated left knee pain unable to walk even with crutches. Three‐dimensional Single photon emission computed tomography/Computed tomography (SPECT/CT) detected left slipped capital femoral epiphysis (SCFE) and secondary Avascular necrosis (AVN). [ABSTRACT FROM AUTHOR]