Joyner v. McDonald, 766 F.3d 1393 (Sept. 12, 2014)
38 U.S.C. § 1117; PAIN CAN ESTABLISH UNDIAGNOSED ILLNESS
Held: “[T]he plain language of [38 U.S.C.] § 1117 makes clear that pain, such as muscle pain or joint pain, may establish an undiagnosed illness that causes a qualifying disability.” 766 F.3d at 1395. The statute does not require the veteran to provide evidence showing that a medical professional has eliminated all possible diagnoses. Id.