Measurements of the normal pituitary stalk
| Mean ± SD | Range | |
|---|---|---|
| Diameter at the pituitary insertion (mm) | ||
| Anteroposterior | 2.32 ± 0.39 | 1.65–3.17 |
| Transverse | 2.16 ± 0.37 | 1.56–3.04 |
| Diameter at the level of optic chiasm (mm) | ||
| Anteroposterior | 3.25 ± 0.43 | 2.25–4.08 |
| Transverse | 3.35 ± 0.44 | 2.39–4.21 |
| Length of the stalk (mm) | 5.91 ± 1.24 | 3.26–8.66 |
| Depth of the infundibular recess (mm) | 4.69 ± 0.87 | 3.28–6.52 |
| Ratio of the length of the stalk to the depth of the infundibular recess | 1.30 ± 0.39 | 0.70–2.19 |