Published in:
01-02-2019 | Test Yourself: Answer
Post-auricular lump: CT diagnosis
Published in: Skeletal Radiology | Issue 2/2019
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On the computed tomography (CT) scan, there was a well-defined bony protuberance just lateral to the left occipital condyle, in keeping with a paracondylar process. It extended inferiorly to articulate with a separate 1.4-cm osseous fragment, which in turn articulated with a protuberance from the left transverse process of the atlas (epitransverse process; Fig. 1 for diagrammatic representation). The findings corresponded to the clinically palpable lump with no other osseous or soft-tissue mass lesion identified.
Fig. 1
Illustrated diagram of the craniovertebral junction in a the posterior projection and b the left anterior oblique projection. ETP epitransverse process, LM lateral mass, OC occipital condyle, PP paracondylar process, TP transverse process
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