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.