> My father is a part of "full body PET scan every 3 years" program as part of post - cancer treatment,

These treatments are wonderful and it is great that they exist. But many people fail to understand the difference in terms of pretest probability, etc.

I can absolutely see the heavy psychological impact pending biopsy results may have. People are quick to discount these issues when you raise them as a concern, but only if they never went through this stress themselves