Plenty of case reports having axillary arch muscle have been reported in the past.
Aziz's report of bilateral axillary arch muscle in a case of trisomy 13 and aneuploidy (trisomy 18), the variant AAM, was found along with other supernumerary muscles, a regular feature found in monkeys and great apes.
The axillary arch muscle (Langer's muscle): clinical importance.
Axillary arch muscle has been implicated in the costo-clavicular compression, axillary vein entrapment and median nerve entrapment.
(13.) Loukas M, Noordeh N, Tubbs RS, Jordan R, Variation of the axillary arch muscle with multiple insertions, Singapore Med J, 2009, 50(2): e88-e90.
Coexistence of an axillary arch muscle
(Latissimocondyloideus muscle) with an unusual axillary artery branching: Case report and review.
axillary arch muscle and the relative closeness of vital structures are of importance to the surgeons and also for academic purposes.
An anomalous axillary arch muscle (latissimocondyloideus muscle) from the upper part of the tendon of latissimus dorsi, 7.5cm before its insertion and ran below the pectoralis major, crossed over the axillary vessels and nerves of the brachial plexus to be inserted into the fascia covering the common tendon of short head of biceps brachii and coracobrachialis.
The axillary arch muscle in its various forms, including latissimocondyloideus muscle is often overlooked.
In addition, there was no evidence of other accessory or anomalous muscles such as axillary arch muscles in the present cadaver.
Previous studies suggested that CET tend to be associated with other muscular variations especially axillary arch muscles. And it has been found more frequently in infants with Patau syndrome (trisomy 13 with a Robertsonian translocation) (Aziz, 1980) and Edward syndrome (trisomy 18) at autopsy (Bersu & Ramirez-Castro, 1977).
Duplicated axillary arch muscles
arising from the latissimus dorsi.