Presentation
Headache
Patient Data
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Left parietal calvarial lesion is seen measuring 1.7 cm and displaying low signal on T1, bright signal on T2 and DWIs. Right maxillary sinusitis. Normal MRV.
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![This study is a stack](/packs/stack-YQKLCKBI.gif)
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![This study is a stack](/packs/stack-YQKLCKBI.gif)
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CT of the same patient done few days later revealed:
left parietal bone defect with smooth and sclerotic margins
right maxillary sinusitis with hyperdense metallic foreign body likely migrated dental implant
Case Discussion
This is a case of incidentally seen left parietal calvarial lesion in a patient complaining of headache. The MR appearance, particularly the high signal on DWI, raised the possibility of intradiploic epidermoid. The CT finding of a sharply demarcated calvarial bony defect is also in keeping with epidermoid. Furthermore, CT confirmed odontogenic right maxillary sinusitis which could explain the patient's headache.