Fig. 2

A Unenhanced and (B) enhanced computed tomography (CT) images obtained from the outside hospital soon after the patient experienced the second attack of severe headache. B A vividly enhancing pouch (asterisk) on contrast-enhanced CT imaging appeared to communicate with the left cavernous internal carotid artery. The findings were highly suggestive of intratumoural pseudoaneurysm formation, although the outside CT report indicated an enlarging apoplectic macroadenoma