Recurring Glioblastoma: A Case for Reoperation?
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ABSTRACT
Unlike newly diagnosed glioblastoma, no clear or widely accepted standard of care is available for patients with a recurrence. A purely radiological diagnosis of recurrence or progression can be hampered by flaws induced by pseudoprogression, pseudoresponse, or radionecrosis. Based on parameters like tumor location and volume, patient’s performance status, time from initial diagnosis, and availability of alternative salvage therapies, reoperation can be considered as a treatment option to extend the overall survival and quality of life of the patient. The achieved extent of resection of the relapsed tumor—especially with the intention of having a safe, complete resection of the enhancing tumor—most likely plays a crucial role in the ultimate outcome and prognosis of the patient, regardless of other modes of treatment. Validated scores to predict the prognosis after reoperation of a patient with a recurrent glioblastoma can help to select suitable candidates for surgery. Safety issues and complication avoidance are pivotal to maximally preserve the patient’s quality of life. Besides a possible direct oncological effect, resampling of the recurrent tumor with detailed pathological and molecular analysis might have an impact on the development, testing, and validation of new salvage therapies.
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