Key legal question
Whether the left thumb complaints and 17 September 2014 surgery were causally related to the accident of 20 September 2013.
Extracted holding
The alleged thumb complaints were not shown with sufficient probability to be an accident consequence; the surgery concerned tumor-like changes/secondary chondromatosis, not a traumatic bone fragment.
Extracted reasoning
Contemporaneous records did not mention a thumb injury. The surgeon's initial diagnosis of a small ossific avulsion was not confirmed intraoperatively; histology and later reports supported a non-traumatic condition, and the internal medical opinion was consistent and convincing.