Barre-Lieou and Thoracic Outlet Syndrome (TOS) After Crainiotomy Posted on January 14, 2018, updated on September 30, 2019 by Robert Schwartz Only AAT members can view the Abnormal Atlas. If you are an AAT member then please click here to login and submit a post to the Atlas. If you are interested in joining, you can do so here. Questions for Physicians? Questions for Technicians?