kschaefer1971, https://connect.mayoclinic.org/search/ Jennifer Hunter knows way more about Thoracic Outlet Syndrome than I do. I did have a brachial branch nerve block, which might be helpful to you. https://www.hss.edu/health-library/conditions-and-treatments/list/thoracic-outlet-syndrome-tos That pinky finger seem like the pertinent clue.