Need advice on applying visa for a Cancer survivor

[bebe]

Hi
Got a Q about applying visa for my father. He is a cancer survivor for 4 years now. My dilema is whether He can mention this in his visa interview or not. He has regular check-ups every 3 months which could strengthen the reason he will not visit for more than 3 months. But could they construe this to be a pre-existing condition and assume he will stay over for treatment (which he obviously wont)
Any pointers appreciated.

[immihelp]

No need to try to show this as an advantage where you risk of having negative impact.

If you are asked anything about it, mention it truthfully. Otherwise, proceed with normal processing.