Localizer images ct1/23/2024 In many instances this is self evident, however, not infrequently the differentiation can be challenging. The first step in correct localization is determining if the mass is intra-axial or extra-axial. LocalizationĬorrect localization of an intracranial mass is essential not only because it is essential in correctly narrowing your differential but also in aiding the treating surgeon in planning their approach. MRI brain tumor protocol).Ī CT is not mandatory, however in practice it is usually available as it is often the first study obtained, and it can give important clues particularly in respect to bony changes or calcification. A good quality MRI with a combination of structural and advanced imaging is crucial (e.g. For approaches to other scenarios please refer to:īefore one can embark upon this task, appropriate imaging needs to be available. Note: This article focuses primarily on supratentorial parenchymal and extra-axial masses in adults. The primary aims of preoperative interpretation are to:Īdditionally if you work in a center where surgery and treatment is going to take place, and thus multidisciplinary review of patients occurs, you will also want to establish framework within which histology results are to be interpreted. This article focus on such cases, but deliberately only considers common entities, and important entities not to miss. It is, however, not unusual for no specific information to be available and in such cases a systematic approach to CT and MRI interpretation will enable you to arrive at a firm preoperative diagnosis in most cases. immunosuppression, systemic malignancy, duration of symptoms) and it is difficult to over-estimate the importance in obtaining such information prior to interpreting images. Often important clues will be present in the clinical history (e.g. ![]() The identification of a supratentorial intracranial mass in an adult is a fairly common clinical scenario, the appropriate management of which relies heavily on preoperative imaging.
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