Congenital Aneurysm of the Superior Vena Cava

Postrenal Segment Aneurysm and Infrahepatic Interruption of the Inferior Vena Cava

“…Aneurysm of the superior vena cava has been reported (I, 7). An aneurysm of the IVC has to our knowledge never been reported in the English medical literature.…”

Primary Axillary Venous Aneurysm

“…3 Although prior trauma may contribute to some cases of venous aneurysms, 2,3,8,9 their ultimate etiology remains unclear, 6 with several congenital, inflammatory, or degenerative wall weakness theories proposed to explain them. 8,[10][11][12][13] In our case, the pathologic findings suggested a venous angiomatous formation. The anomalies found in the mus- cular layer have been reported by others in the wall of venous aneurysms 1,6,7,14,15 and may represent a congenital wall weakness.…”