WRectum
WColorectal surgery
WEnema
WHemorrhoid
WImperforate anus
WMiddle rectal artery
WPararectal lymph nodes
WRectocele
WRectal administration
WRectal douching
WRectal examination
WRectal foreign body
WRectal prolapse
WRectal venous plexus
WRectovaginal fistula
WSuperior rectal vein
WTransverse folds of rectum