Various illlustrations depicting "malformations of the Veins" and "phlebografic - angiology in vein-related, low-flow malformation".
These illustrations among others, are used to graphically represent the latest recognition as published in medical journals.
Type I (Almost) isolated malformation without peripheral drainage
Type II Malformation that drains into normal veins
Type III Malformation that drains into dysplastic veins
Type IV Venous ectasia
Assignment through Dr. R. Kammer and Prof. I Baumgartner