Key legal question
Whether the right nephrectomy was causally related to the 2007 accident and thus covered by accident insurance.
Extracted holding
The cantonal court could not rely solely on the treating nephrologist's opinion; a neutral expert opinion is required before deciding causality.
Extracted reasoning
The treating specialist's reports did not adequately address contrary indications from the surgical expert and the record. Given conflicting medical opinions and the limits of treating-physician evidence, the lower court should have ordered an independent expert assessment.