Table 2 . Comparison of clinical characteristics and outcome of SPN patients between present study and worldwide studies .
| Study | Number of cases |
Age, mean
(range) year |
Sex ratio
(F/M) |
Tumor size, mean
(range) Cm |
Follow-up, mean
(range) month |
No.distant meatastases | Survival, % |
| Salvia et al.33 | 31 | 34 (7-56) | 27/4 | 5.4 (2-20) | 58 (12-229) | 0 | 100 |
| Tipton et al.26 | 14 | 30 (15-57) | 13/1 | 7 (4-16) | 88 (3-240) | 2 | 100 |
| Goh et al.24 | 16 | 30 (14-53) | 15/1 | 9.5 (5-24) | 67 (3-186) | 0 | 100 |
| Yang et al.41 | 26 | 32 (15-64) | 22/4 | 6.25 (2-15) | 33 (3-69) | 2 | 96.2 |
| Guo et al.42 | 24 | 31 (11-61) | 23/1 | 7.5 (2-26) | 68 (4-109) | 2 | 95.8 |
| Zhang et al.43 | 9 | 30 (14-68) | 8/1 | 5.4 (2-10.5) | 30 (NA) | 2 | 88.8 |
| Vassos et al.44 | 4 | 24.5 (15-42) | 4/0 | 5.5 (1-16) | 40 (24-57) | 0 | 100 |
| Present study | 7 | 29.7 (15-61) | 6/1 | 4.03 (1.2-6) | 14 (7-30) | 0 | 100 |