TABLE 1.
Characteristics of patients by GNAS mutation status
| Characteristic | GNAS wild type (n = 34) | GNAS mutant (n = 52) | P |
|---|---|---|---|
| Age, y, median (range) | 71 (48–85) | 71 (35–91) | 0.533 |
| Gender | 0.266 | ||
| Female | 17 (50 %) | 19 (37 %) | |
| Male | 17 (50 %) | 33 (63 %) | |
| Smoking history | 0.235 | ||
| Never | 25 (76 %) | 31 (62 %) | |
| Ever | 8 (24 %) | 19 (38 %) | |
| Unknown | 1 | 2 | |
| Alcohol use | >0.99 | ||
| None | 7 (44 %) | 11 (42 %) | |
| Some | 9 (56 %) | 15 (58 %) | |
| Unknown | 18 | 26 | |
| Dysplasia | |||
| Low grade | 19 (29 %) | 10 (19 %) | 0.305 |
| Intermediate grade | 7 (21 %) | 12 (23 %) | >0.99 |
| High grade | 17 (50 %) | 30 (58 %) | 0.514 |
| Focality | >0.99 | ||
| Unifocal | 23 (79 %) | 37 (77 %) | |
| Multifocal | 6 (21 %) | 11 (23 %) | |
| Unknown | 5 | 4 | |
| Duct | 0.948 | ||
| Main | 12 (38 %) | 18 (41 %) | |
| Mixed | 4 (12 %) | 5 (11 %) | |
| Branch | 16 (50 %) | 21 (48 %) | |
| Unknown | 2 | 8 | |
| Cyst size | >0.99 | ||
| <3 cm | 17 (53 %) | 28 (55 %) | |
| ≥3 cm | 15 (47 %) | 23 (45 %) | |
| Unknown | 2 | 1 | |
| Size, cm, median (range) | 2.2 (0.5–8) | 2.5 (0.6–8) | 0.35 |
| Invasive cancer | 0.809 | ||
| No | 25 (74 %) | 36 (69 %) | |
| Yes | 9 (26 %) | 16 (31 %) | |
| Site | |||
| Pancreatobiliary | 2 (7 %) | 5 (11 %) | 0.694 |
| Gastric | 26 (87 %) | 27 (61 %) | 0.02 |
| Intestinal | 0 | 12 (27 %) | 0.001 |
| Oncocytic | 2 (7 %) | 0 | 0.161 |
| Location | 0.493 | ||
| Distal | 21 (62 %) | 36 (69 %) | |
| Head–neck–uncinate process | 13 (38 %) | 16 (31 %) |