The venous chiasma between the basilic vein and the brachial vein: a case report.

Variations in the venous pattern of the arm are common. In this case report, we are presenting the variations of the brachial vein and the basilic vein.During the routine dissections which were done by medical undergraduate students, we observed some variations in the veins of the upper limb. In the current case, there was only one brachial vein which accompanied the brachial artery. The basilic vein originated from the medial side of the dorsal venous network, ascended along the medial side of the forearm and joined the brachial vein to form the axillary vein at the distal border of the teres major muscle. The basilic vein and the brachial vein joined with one another in the middle of the arm to form a unique venous chiasma.A large number of invasive procedures are carried out by using the veins of the upper limb, particularly in and distal to the axillary region. This type of a venous chiasma may lead to complications in these procedures.