In Denise Elberson v. WCAB (Elwyn, Inc.), the Commonwealth Court held that an employer’s medical expert witness must first recognize the full and complete description of the work injuries accepted by the employer as compensable in order for the expert’s full recovery opinion to be successful in a Petition to Terminate compensation benefits. In Elberson, the employer’s medical expert testified that he thought or believed that the claimant’s work injury involved a “lumbar strain or sprain”. However, in the Notice of Compensation Payable issued by the employer accepting claimant’s injuries, those injuries were described as a “lumbar disc herniation”. The Commonwealth Court held that, because the employer’s medical expert did not agree that the work injury involved or included a disc herniation, his opinion of full recovery was insufficient to establish that the claimant had fully recovered from his work injuries. The Court indicated that “at a bare minimum, the expert must know what the accepted work-related injury was to be competent to testify that a claimant has fully recovered from a work-related injury”.