Question juridique clé
Whether the insurer remained liable for the later knee complaints as a relapse causally linked to the 2006 accident.
Solution extraite
The evidence did not establish a natural causal connection with the required degree of probability.
Motifs extraits
The Federal Court upheld the cantonal court's assessment that the file no longer supported a probable causal link between the accident and the later complaints; the appeal largely repeated earlier arguments and did not meaningfully address the lower court's reasoning.