The medial trunk gave off the lateral thoracic artery and was divided into the subscapular artery and the posterior circumflex humeral artery
. AA--axillary artery, ACHA--anterior circumflex humeral artery, BA--brachial artery, CBM-- coracobrachialis muscle, CSA -circumflex scapular artery, IT--intermediate trunk, LT--lateral trunk, LTA- -lateral thoracic artery, MCN-- musculocutaneous nerve, MN--median nerve, MT -medial trunk, PB--pectoral branch, PCHA--posterior circumflex humeral artery, Pm-- pectoralis minor muscle, SBRA--superficial brachioradial artery, SSA--subscapular artery, TA-- thoracodorsal artery, UN--ulnar nerve.
In up to 30% of the cases, the subscapular artery can arise from a common trunk with the posterior circumflex humeral artery. Occasionally, the subscapular, anterior circumflex humeral, posterior circumflex humeral and profunda brachii arteries arise in common.
This common artery continues distally as the posterior circumflex humeral artery. The other 3 branches of axillary artery had a normal origin and the axillary artery itself followed a normal anatomical course in the upper limb as the brachial artery (picture 2).
(6) In the present case the common trunk which further gives rise to the lateral thoracic, thoraco-dorsal, circumflex scapular arteries and continues as the posterior circumflex humeral artery may be considered as the deep brachial artery in accordance with the studies of the previous researchers.
The communicating perforators from the deltoid branch of the thoraco-acromial axis and posterior circumflex humeral artery
Life-threatening posterior circumflex humeral artery injury secondary to fracture-dislocation of the proximal humerus.
Occlusion and stenosis of the posterior circumflex humeral artery: detection with ultrasound in a normal population.
The fibromuscular slip between the Brachialis and Brachioradialis forms a fibromuscular tunnel underneath which lies the Radial nerve along with descending branch of posterior circumflex humeral artery. No mention of this vascular relationship was found in available literature.
CASE REPORT: We report a case of possible entrapment of Radial nerve and descending branch of posterior circumflex humeral artery due to abnormal fibromuscular tunnel between Brachialis and Brachioradialis on the left side in a middle aged male cadaver.
* The three terminal branches of the collateral artery are posterior circumflex humeral artery, circumflex scapular artery and thoracodorsal arteries.
* The posterior circumflex humeral artery descends superficial to the axillary nerve and passed through the quadrangular space.
In up to 30% of cases, the subscapular artery can arise from a common trunk with the posterior circumflex humeral artery
. Occasionally the subscapular, circumflex humeral and profunda brachii arteries arise in common, in which case, branches of the brachial plexus surround this common vessel instead of axillary artery.