Anatomical variations of the formation and distribution of the brachial plexus are fairly common and it is related to the embryological development of upper limbs. The present report describes an unusual variation of the brachial plexus in which the cords are st nd arranged lateral to the 1 and 2 parts of the axillary artery. Therefore, some of the main terminal branches show rd different relationship to the 3 part of the axillary artery and the brachial artery. Awareness of such variations of the formation, relations and distribution of main branches of brachial plexus is of remarkable clinical importance for clinicians who carry out surgical, interventional radiological and anaesthetic procedures in the axillary region.

Anatomical variations of the renal arteries and gonadal arteries are not uncommon owing to their embryological origin. Awareness of possible anatomical variations of the renal artery and gonadal artery is essential for surgeons who perform open and minimally invasive procedures of the kidneys and retroperitoneal region to prevent disastrous haemorrhagic complications during those procedures and for radiologists to prevent misinterpretations of imaging and to prevent vascular complications during interventional procedures.The present report describes an unusual variation of the left ovarian artery arising from the inferior renal polar artery which originated from the abdominal aorta superior to the main renal artery.