Key legal question
Whether the insured's back pain since March 2003 is in natural and adequate causal connection with the 1991 accident
Extracted holding
The medical basis was insufficient; further clarification was required before the causal link could be finally assessed.
Extracted reasoning
The expert report did not convincingly address the long latency period, the effect of the prosthesis and altered gait, or distinguish accident-related from disease-related spinal changes. A supplementary report and, if needed, a new expert opinion were necessary.