We successfully defended a Claim Petition on behalf of a national trucking company where the claimant alleged a disabling aggravation of a pre-existing cervical condition from a fall at work. Our thorough review of the medical records and the presentation of the evidence convinced the judge that the claimant did not meet his burden of proof on causation. While providing the requisite direct testimony, on cross examination, the claimant’s expert admitted when he first saw the claimant one month after the work incident, the claimant had a head droop from cervical fusion surgery five months before the date of injury, and said that surgery “unrelated” to the work injury would be needed to correct it. This was inconsistent with the expert’s direct examination testimony, which was that the work incident had caused the head droop. Further, with the employer’s expert, who reviewed the testimony of the claimant’s expert and reviewed all medical records pre- and post-incident, we were able to establish that the opinion of the claimant’s expert was flawed, pointing out that the claimant’s expert failed to perform a side-by-side comparison of pre-injury diagnostic studies to post-injury studies, which would indicate whether the head droop was a slow progression from the prior surgery or due to a traumatic incident. The Judge found that the claimant’s expert failed to adequately explain what he saw in the studies completed after the work incident that supported his theory on causation.