Residual or recurrent cerebellar low-grade glioma in children after tumor resection: is re-treatment needed? A single center experience from 1983 to 2003.

PURPOSE: The aim of this study was to report on children with cerebellar low-grade glioma (LGG), who were found to have progressive or nonprogresssive residual tumors or tumor recurrence after tumor resection. PATIENTS AND METHODS: Medical records and magnetic resonance imaging (MRI) studies of children (<16 years) with cerebellar LGG were retrospectively analyzed.
RESULTS: Of 289 patients with CNS tumors referred between 1983 and 2003, 28 (9.7%) (15 male, 13 female; median age at diagnosis: 71 months) had cerebellar LGG (pilocytic astrocytoma grade I: n = 21; fibrillary astrocytoma grade II: n = 5; mixed hamartoma/pilocytic astrocytoma: n = 1; radiographic diagnosis: n = 1). Total resection was initially performed in 16 patients (57.1%), near total resection in 4 (14.3%), and partial resection in 6 patients (21.4%). One patient underwent biopsy. At a median follow-up of 112 months, 25 patients (89.3%) were alive, 18 of them being in complete remission. Three patients died, 2 due to symptoms related to brain stem compression/infiltration and 1 patient due to postoperative cerebral edema. Presently 5 patients have nonprogressive residual tumors and 2 patients developed nonprogressive recurrences 10 years and 20 months after initial total resection, respectively. None of them required second surgery and none received additional nonsurgical therapies. Only 1 additional patient had to undergo second surgery due to disease progression.
CONCLUSIONS: A 'wait and see' strategy is justified in patients with nonprogressive recurrent or residual cerebellar LGG after primary tumor resection. However, long-term follow-up with repeated MRI is mandatory in these patients to detect disease progression. Second surgery is indicated only in patients with unequivocal disease progression, as documented by MRI. Copyright 2006 S. Karger AG, Basel