“…9,[11][12][13][14][15][16]18,19,22,24 All but one 15 demonstrated an early stage to be the most significant prognostic factor for better survival. 9,[11][12][13][14]16,18,19,22,24 The next most frequent independent prognostic factor was a younger age. 11,15,16,18,24 Other factors reported to have contributed to survival included female gender, 11,12,22 surgical resection, 13,14,18 low-grade histology, 12,13,24 smaller size of tumor, 15,24 and a good performance status.…”