Histopathological changes in haemorrhoid associated mucosa and submucosa.

The histological features of haemorrhoids are detailed in this study with special attention to the mucosal changes. These include significant crypt distortion, with stromal hyperplasia which bear a remarkable resemblance to the changes seen in mucosal prolapse syndrome. We propose that the mucosal prolapse syndrome should include haemorrhoids as part of the spectrum.