REGIONAL EXPOSURE OF CEREBRAL CONVEXITY LESIONS

The utility and reliability of a simple technique for the localization of cerebral convexity lesions are retrospectively analyzed in 83 intr acranial procedures. The technique is based on data obtained from preo perative computed tomography (CT) scans, and on a few anthropological landmarks which usually can be identified on both the patient's head a nd skull radiograms. This method allowed precise placement of small cr aniotomy flaps (3 to 7 cm in diameter) in 94 % of the patients studied . In the remaining, localization errors were corrected either by enlar ging the craniotomy opening (3 cases), or by rescanning during the ope rative procedure (2 cases). Due to its technical simplicity and reliab ility in the vast majority of cases, the bony landmark method constitu tes a recommendable alternative for the localization of convexity lesi ons, being particularly useful when highly sophisticated equipment is not available.