Variation in the axillary anatomy is of tremendous practical relevance along almost all operations executed in this area. The aim of this study is to report and discuss a case with the axillary arch of Langer.
Case Report:
A 48-year-old lady presented to the clinic with a right breast mass sized about 3× 2.5 cm in the upper outer quadrant for a 6-month duration. The mass was proved to be malignant. During mastectomy and axillary lymph node dissection, an abnormal muscle was encountered that crossed the axilla in front of the axillary vessels and extended from the pectoralis major muscle to the latissmus dorsi.
Conclusion:
Axillary arch of Langer is a rare but crucial anatomical variation of the axillary region required to be known by every physician and surgeon dealing with pathologies in this region to promote their assessment and dissection skill.

Link :

https://www.researchgate.net/profile/Ayad-Mohammed/publication/328917149_Langar's_axillary_arch_a_misguiding_finding_to_the_physicians_and_unexpected_barrier_to_the_surgeons/links/5c82177492851c695060ac45/Langars-axillary-arch-a-misguiding-finding-to-the-physicians-and-unexpected-barrier-to-the-surgeons.pdf