Ossification centers of the elbow

Last revised by Andrew Murphy on 09 Feb 2022

There are six ossification centers of the elbow that appear and develop in a relatively reproducible fashion, and are key to assessment of the pediatric elbow radiograph. Timing of their appearance varies in the literature but an approximation is given below. A useful mnemonic to remember the order of development is CRITOL or CRITOE (see video below).

See also

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Cases and figures

  • Figure 1: frontal
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  • Figure 2: lateral
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  • Figure 3: labeled anatomy
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  • Figure 4: labeled anatomy
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  • Figure 5: age 2
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  • Figure 6: age 4
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  • Figure 7: age 5
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  • Figure 8: age 9
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  • Figure 9: age 11
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