[janardanyri]

> It is equally plausible that the diagnostic center told the patient that results were negative, and the call to the mother was to reassure her and to the surgeon to cancel a preemptive appointment made by the doctor.

The metadata would not end with that phone call - the pattern of continuing activities would make fairly evident what the prognosis had been. (Of course this doesn't meet the "beyond all reasonable doubt" standard of criminal court, but it meets the standard for justifying digging deeper into their affairs, or setting insurance rates for that matter.)