Sentinel lymph node biopsy as a prognostic factor in non-metastatic colon cancer: a prospective study.

Purpose: Around a third of node-negative patients with colon cancer experience a recurrence after surgery, suggesting poor staging. Sentinel lymph node techniques combined with immunochemistry could improve colon cancer staging. We prospectively assessed the effect of Sentinel node mapping on staging and survival in patients with non-metastatic colon cancer.

A comparative study of structure and function of the longitudinal muscle of the anal canal and the internal anal sphincter in pigs.

Purpose: This study aims to compare the physiology of the longitudinal muscle of the anal canal with the internal anal sphincter in pigs.

Methods: Histology and in vitro studies were performed to compare the effect of neural responses induced by electric stimulation and through nicotinic, purinergic, and serotoninergic receptors.

Results: The longitudinal muscle and the internal anal sphincter are constituted exclusively by smooth muscle.