A case of an additional right external iliac vein surrounding the right external iliac artery and lacking the right common iliac vein

Abstract

A case of an additional right external iliac vein lacking a right common iliac vein was found in an 84-year-old female cadaver during a dissection course at Aichi Medical University in 2014. The findings are reported and discussed from the embryological and clinical viewpoints. The right and left iliac venous systems were macroscopically observed with attention to the homonymous arteries and the inferior vena cava. In this cadaver, a preaortic external iliac vein originated from a right external iliac vein and drained directly into the inferior vena cava. The preaortic and right external iliac veins surrounded the right external iliac artery. In addition, the right internal iliac vein drained into the left common iliac vein, and the right obturator vein drained into the right external iliac vein. Our findings suggested that normal external iliac veins developed from the ventral limb of the iliac venous system in this case. Our case has clinical importance for surgical complications such as hemorrhages in pelvic operations, phlebography, and especially central venous cauterization of the right femoral vein.

Complete duplication of left and right external iliac vein: two case reports and review of the literature

“…Djedovic et al reported a case of partial duplication and an annulus formation in the left external iliac vein [5]. Hayashi et al reported an additional right external iliac vein in their cadaver dissection, and Nishimura et al reported a complete duplication of the left external iliac vein incidentally during a laparoscopic pelvic lymph node dissection as in our case [6, 7].…”

Unique branching pattern of the internal iliac artery accompanied by an supernumerary internal iliac vein

“…However, prior reports have described cases of absence or duplication of the iliac veins and inferior vena cava [8][9][10], as well as various patterns of draining and fenestration [11]. The coexistence of a supernumerary IIV and two anastomoses connecting it with its counterpart makes our case unique.…”

Dangerous twisted communications between external and internal iliac veins which might rupture during catheterization

“…In rare cases, it may be absent [1]. It may undergo aplasia [2] or even be duplicated [3]. Its reported anomalies also include a prearterial external iliac vein [4] and a venous annulus formed around external iliac artery by it [5].…”