Ischemic brachial artery entrapment syndrome by supracondylar humeral bony spur

Simultaneous Compression of the Neurovascular Bundle of Both Arms by a Bilateral Supracondylar Humeral Process: A Rare Case of Bilateral Nerve Entrapment of the Elbow in a Child

The supracondylar process is a beak-shaped bone spur arising from the anteromedial area of the distal humerus and in the majority of cases, it is connected to the medial epicondyle with a band of connective tissue which is known as ligament of Struthers. The complex of bone spur and ligament creates a ring that may compress the median nerve causing soreness and paresthesia of the hand and fingers. We present a rare case of bilateral supracondylar process compressing the neurovascular bundles in both arms and causing simultaneous bilateral upper limb pain, numbness, and weakness in an otherwise healthy young child. Surgical excision of the bone spurs and release of Struthers' ligaments provided immediate pain relief and complete resolution of symptoms. Three years after the index surgery, no limitations of activities or signs of recurrence were reported. Median nerve compression neuropathy in a child or a young adult should always raise the suspicion of the presence of supracondylar process particularly when bilateral symptoms exist. Although there are limited data about the incidence of recurrence and the extent of bone resection, the supracondylar process should be excised together with the overlying periosteum to minimize the theoretical risk of local regrowth.

Rare case of median nerve and brachial artery entrapment by an abnormal musculo-fascial tunnel in the arm: possible cause of neurovascular compression syndrome

Entrapment neuropathies of the peripheral nervous system are frequently encountered due to anatomical variations. Median nerve is the most vulnerable nerve to undergo entrapment neuropathies. The clinical complications are mostly manifested by median nerve impingement in forearm and wrist areas. Median nerve entrapment could also occur at the arm, due to the presence of ligament of Struthers. Here we report a rare case of proximal entrapment of median nerve and brachial artery in the arm by an abnormally formed musculo-fascial tunnel. The tunnel was formed by the muscle fibers of brachialis and medial intermuscular septum in the lower part of arm. Due to this, the median nerve coursed deep, below the tunnel and continued distally into the forearm, underneath the pronator teres muscle and hence did not appear as a content of cubital fossa. The present entrapment of neurovascular structures in the tunnel might lead to pronator syndromes or other neurovascular compression syndromes.

Postoperative brachial artery entrapment associated with pediatric supracondylar fracture of the humerus: a case report

BACKGROUND

Severely displaced supracondylar fractures of the humerus in children are frequently associated with complications including neurovascular injuries, non-union, or compartment syndrome. In the current literature, no report exists about postoperative brachial artery entrapment in combination with an inconspicuous preoperative neurovascular examination.

CASE PRESENTATION

We present a case of a 6-year-old white boy with a pulseless radial and ulnar artery after open reduction and internal fixation of a severely displaced supracondylar fracture of his right humerus (Gartland type III) using four K-wires. Remarkably, the preoperative neurovascular examination was inconspicuous. Doppler ultrasound of his brachial artery revealed no pulse when his elbow was in flexion and a faint pulse when it was in full extension 10 hours postoperatively. Revision surgery was performed immediately. On intraoperative examination, a kinking of his brachial artery caused by an entrapment of the tunica externa in the reduced fracture was seen and the artery was released by microsurgical arteriolysis immediately. At the final follow-up examination, positive palpable pulse with good capillary filling and, according to Flynn's criteria, an excellent recovery of elbow function was observed 3 months postoperatively.

CONCLUSIONS

This case demonstrates a rare complication of postoperative artery entrapment with inconspicuous preoperative neurovascular examination. It strongly emphasizes the need for a standardized postoperative neurovascular assessment with fully flexed as well as fully extended elbow.