Immunoreactivity of microsomal prostaglandin E synthase 1 in the squamous cell lesions of the lower oesophagus in normal controls and experimental groups
| Positive | Negative | |
|---|---|---|
| *p<0.05 compared with normal and papillary hyperplasia. | ||
| Normal controls | 0 | 8 |
| Papillary hyperplasia | 3 | 24 |
| Dysplasia | 28* | 0 |