Presentation
Headache
Patient Data
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.
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.
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