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  • Title: Surgical treatment of intramedullary ependymomas.
    Author: Prokopienko M, Kunert P, Podgórska A, Marchel A.
    Journal: Neurol Neurochir Pol; 2017; 51(6):439-445. PubMed ID: 28826916.
    Abstract:
    OBJECT: The aims of this study were to present the results of surgery for intramedullary ependymomas (IEs), analyze complication and recurrence rates, and analyze factors that might influence outcome. METHODS: The charts of 29 consecutive patients (women - 8, men - 21; mean age - 38 years; range: 18-72) operated for IE were retrospectively analyzed. Mean follow-up was 9 years. Eighteen tumors (62%) were located in the cervical or cervicothoracic spine, and average tumor length was four spinal levels. Twenty patients (69%) presented with neurological deficit. RESULTS: Gross total resections (GTRs) comprised 87% of cases, subtotal resections (STRs) 10%, and partial resections 3%. The neurological outcome on postoperative day 1 was as follows: modified McCormick scale (mMS) grade I - 6%, grade II - 21%, grade III - 21%, grade IV - 31%, and grade V - 21%; at follow-up, outcomes were mMS grade I - 42%, grade II - 34%, grade III - 10%, and grade V - 14% of patients. Compared to the preoperative period, 69% of patients deteriorated postoperatively; however, 62% improved or remained without deficit in follow-up, and deterioration persisted in 24%. The functional results were significantly worse when the intraoperative monitoring potentials dropped below 50% (p=0.005) and if the tumor involved >3 spinal levels (p=0.039). Fourteen postoperative complications in 10 patients (34%) included respiratory failure (14%), pneumonia (7%), urinary infection (10%), bed sores (10%), and CSF leak (7%). Two tumors progressed after STR, with progression-free survival times of 5 and 14 years. No recurrence was observed after GTR. CONCLUSIONS: Total tumor resection is the treatment of choice in cases of IEs: no tumor re-growth occurred after total resection, 86% of patients were independent at follow-up, and the 10-year survival rate was 79%.
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