Key legal question
Whether the insured's bronchus carcinoma was predominantly caused by occupational asbestos exposure and thus constituted an occupational disease.
Extracted holding
The medical and occupational evidence was insufficiently resolved; the case had to be remitted for an independent expert assessment of cumulative asbestos exposure.
Extracted reasoning
The record contained conflicting indications about the nature and intensity of exposure. The Helsinki criteria remained a usable benchmark, but the SUVA expert's estimate was contradicted by published occupational exposure data, leaving the evidentiary basis inconclusive.