RESUMEN
In the Dissection Team of the Second Chair of Anatomy at the School of Medicine of the University of Buenos Aires, Argentina, during the routine dissection of 78 cadavers (corresponding to 156 supraclavicular fossae),10% formalin fixed, we found the supraclavicularis proprius muscle over the lower part of the left supraclavicular fossa in an adult Caucasian male cadaver. We described this rare muscular anomaly, the likelihood of finding this muscle, and its participation in supraclavicular nerve entrapment syndrome.
Asunto(s)
Clavícula/anatomía & histología , Músculo Esquelético/anomalías , Región Branquial/anatomía & histología , Disección , Humanos , Masculino , Síndromes de Compresión Nerviosa/patologíaRESUMEN
The axillary arch is the main variation of the axillary muscle. It was first described by Ramsay in 1795. In its classical form, it arises from the latissimus dorsi muscle and extends from this towards the pectoralis major, crossing the base of the axilla and creating a close relationship with the elements of the axillary neurovascular bundle. We describe the finding of 9 axillary arches, including one case of a bilateral arrangement. We develop a searching and finding technique for the axillary arch, essential for the safe and successful development of surgical procedures in the axillary region. Knowledge of this muscle variation and the possibility of finding it during axillary procedures is crucial for lymph node staging and lymphadenectomy and is also important for differential diagnosis in compressive pathologies of the axillary vessels and brachial plexus.