All-Endoscopic Resection of an Infraclavicular Brachial Plexus Schwannoma: Surgical Technique.

Due to recent progress in shoulder arthroscopy, all-endoscopic brachial plexus (BP) dissection has progressively become a standardized procedure. Based on previously described techniques, we present an additional neurological procedure that may be performed all-endoscopically, that is, the excision of an infraclavicular BP schwannoma. Starting from a standard shoulder arthroscopy with posterior and lateral portals, additional anterior and medial portals are progressively opened outside the joint under endoscopic control to access the BP. At first, dissection of the subcoracoid space allows the identification of the posterior and lateral cords, along with the axillary artery. Then, by performing a pectoralis minor tenotomy, the medial cord and axillary vein are exposed, giving access to the whole infraclavicular plexus. Intraneural dissection is performed using arthroscopic tools such as a long beaver blade, a grasper, and a smooth dissector to progressively extract the encapsulated tumor from the nerve without any damage. Using a standardized technique, endoscopy may be an advantageous tool in selected cases of BP benign peripheral nerve sheath tumors.