Main features of the patients who underwent follow-up (n = 89, arm B)
| FU, follow-up. | |
| Values are given as n (%) unless otherwise specified. | |
| *These rates refer to patients with multifocal disease (n = 57). | |
| Male | 35 (39) |
| Female | 54 (61) |
| Median (range) age | 64 (28–81) years |
| Median (range) FU | 32 (24–71) months |
| Location of the main lesion | |
| Head or uncinate process | 44 (49.4) |
| Neck | 21 (23.6) |
| Body | 18 (20.3) |
| Tail | 6 (6.7) |
| Extension of the disease | |
| Unifocal disease | 32 (36) |
| Multifocal disease | 57 (64) |
| Two lesions | 9 (15.8*) |
| ⩾3 lesions | 48 (84.2*) |
| Whole-gland involvement | 18 (31.6*) |
| Single-area involvement | 19 (33.3*) |
| Head and tail involvement | 20 (35.1*) |