1. Transvaginal ultrasonography combined with water-contrast in the rectum in the diagnosis of rectovaginal endometriosis infiltrating the bowel 
Mario Valenzano Menada, M.D., Valentino Remorgida, M.D., Luiza Helena Abbamonte, M.D., Ezio Fulcheri, M.D., Nicola Ragni, M.D., Simone Ferrero, M.D. 
Fertility and Sterility 
Volume 89, Issue 3, Pages (March 2008)
DOI: /j.fertnstert
Copyright © 2008 American Society for Reproductive Medicine Terms and Conditions

2. Figure 1
The three panels (from left to right) indicate the progressive distension of the rectal wall obtained by introducing saline solution into the rectal lumen through a 6-mm catheter.
Fertility and Sterility  , DOI: ( /j.fertnstert )
Copyright © 2008 American Society for Reproductive Medicine Terms and Conditions

3. Figure 2
Rectal endometriotic nodule (arrowheads). It appears as a hypoechoic mass that thickens the muscolaris mucosa; the submucosa and mucosa is hyperechoic (arrow). The asterisk indicates a rectal Houston valve.
Fertility and Sterility  , DOI: ( /j.fertnstert )
Copyright © 2008 American Society for Reproductive Medicine Terms and Conditions

4. Figure 3
A rectal endometriotic nodule (arrowheads) infiltrates the submucosa (arrow). This finding was confirmed by the histologic examination of the specimen removed at surgery.
Fertility and Sterility  , DOI: ( /j.fertnstert )
Copyright © 2008 American Society for Reproductive Medicine Terms and Conditions