Key legal question
Whether the revision request was filed within the 90-day time limit
Extracted holding
The insured had secure knowledge of the revision ground only when the medical report of 22 August 2017 was received on 31 August 2017; the request filed on 29 November 2017 was timely.
Extracted reasoning
The operation report and initial histology were only indications. Time started when further inquiries clarified the new facts and their significance.