MATERIAL and METHODS: Data of the patients diagnosed and treated between 1999 and 2017 in Gazi University School of Medicine has been collected through patients’ files and the electronic database of hospital records. Statistical analysis was applied to evaluate the correlation between the progression free survival and treatment modalities.

RESULTS: Nine of the 16 patients were women (56.3%). Half of the patients had intracranially located tumors, whereas the other 50% of the sample had spinal (n=5) and sacral (n=3) chordomas. The median follow-up time was 51.7 months. Recurrence was observed in 50% of patients, while the median recurrence time equaled to 27.6 months. Multivariate analysis results showed that age, gender tumor size, intra or extracranial location of tumor, treatment modalities, subtotal or grosstotal resection of tumor, radiotherapy dose, and techniques were not associated with recurrence. On the other hand, 2 patients are still under chemoterapy (imatinib, bevacizumab) without evident of recurrent disease.

CONCLUSION: Despite the fact that surgery remains to be the cornerstone of treatment, total resection is not reasonable for all patients with chordomas. For this reason, adjuvant treatment for ensuring local control is highly important. If the residual tumor is of a small volume, SBRT may provide more advantages. Targeted treatment or chemotheapeutic agents may also be benificial for maintanence therapy. As the clinical awareness about chordomas is based on our series, aggressive multi-modality treatment options should be applied in the adjuvant therapy. Keywords : Chordoma, Radiotherapy, Radiosurgery, Surgery, Imatinib, Bevacizumab