Density of innervation in regions of the rectum in controls and in patients with idiopathic megarectum
| Longitudinal muscle | Circular muscle | Muscularis mucosae | Lamina propria | |
| Controls | ||||
| S100 | 1 (0, 2) | 4 (4) | 2 (0, 2) | 2 (0, 3) |
| PGP 9.5 | 2 (1, 2) | 4 (4) | – | – |
| Idiopathic megarectum | ||||
| S100 | 1 (0, 3) | 4 (3, 5) | 2 (0, 3) | 2 (0, 3) |
| PGP 9.5 | 1 (0, 2) | 3 (3, 4) | 3 (0, 3) | 3 (0, 3) |
Values given are median (range) score. Scoring system: 0, absent; 1, very sparse; 2, sparse; 3, moderate; 4, dense; 5, very dense. Tissues from 11 control patients and 15 patients with idiopathic megarectum.
Dashes represent too much background staining for accurate scoring.