Erratum

uptake between the left and right condyles with increased uptake ipsilateral to the CH is considered to be evidence of active, growing CH (1–3). Normally, the condyles are nearly symmetric and CT is a useful tool to measure and evaluate condylar dimensions (5). Degenerative or inflammatory arthropathies of TMJs may complicate evaluation of growth activity as these conditions manifest with inherently increased 99mTc-MDP uptake. However, this is generally not problematic as patients present with CH when they are relatively young (1). Degenerative bony changes occur more often and are more severe on the unaffected side than on the affected, hyperplastic side (4). The CT portion of SPECT/CT can be used to evaluate the underlying bony changes to confirm degenerative changes and rule out other possible causes of increased uptake, such as a tumor or trauma.