TABLE 2.
Comparison of MRI Features Between DG and SG GH Pituitary Adenomas
| Variable | DG (n = 36) | SG (n = 34) | z/χ2 | P |
|---|---|---|---|---|
| Tumor size, median (IQR), cm | ||||
| Mean diameter | 1.767 (1.308–2.433) | 2.450 (1.725–2.792) | 2.104 | 0.035* |
| Mean diameter | 6.507 | 0.039 | ||
| <1.5 | 13 (37.1) | 6 (17.6) | ||
| 1.5–2.2 | 10 (28.6) | 6 (17.6) | ||
| >2.2 | 12 (34.3) | 22 (64.7) | ||
| Maximum diameter | 1.950 (1.500–2.850) | 3.000 (1.975–3.325) | 2.523 | 0.012* |
| Maximum diameter | 6.050 | 0.049 | ||
| <1.6 | 19 (52.8) | 9 (26.5) | ||
| 1.6–2.3 | 10 (17.8) | 12 (35.3) | ||
| >2.3 | 7 (19.4) | 13 (38.2) | ||
| Homogeneity, n (%) | 0.243 | 0.622 | ||
| Homogeneous | 18 (50) | 19 (55.9) | ||
| Heterogeneous | 18 (50) | 15 (44.1) | 0.000 | 1.000 |
| Cystic necrosis | 12 (33.3) | 10 (29.4) | ||
| Hemorrhage | 6 (16.7) | 5 (14.7) | ||
| T2 signal intensity, n (%) | 5.426 | 0.020 | ||
| Hypointense | 31 (86.1) | 21 (61.8) | ||
| Hyperintense | 5 (13.9) | 13 (38.2) | ||
| T2 rSI, n (%) | 10.212 | 0.001 | ||
| <1 | 30 (83.3) | 16 (47.1) | ||
| >1 | 6 (16.7) | 18 (52.9) | ||
| Contrast enhancement, n (%) | 10.380 | 0.001 | ||
| Mild-moderate | 21 (58.3) | 7 (20.6) | ||
| Marked | 15 (41.7) | 27 (79.4) | ||
| Knosp grade, n (%) | 11.187 | 0.004 | ||
| 0–1 | 17 (47.2) | 5 (14.7) | ||
| 2–3 | 16 (44.4) | 18 (52.9) | ||
| 4 | 3 (8.3) | 11 (32.3) |
*Comparisons between groups using the Mann-Whitney U test.
IQR indicates interquartile range.