Can cats smell cancer or injuries/infection?

I was wondering if anyone has info on whether cats can detect cancer as
well as dogs. My dog sammy had cancer of the nose and skin, and my two
cats were constantly going up to him and smelling the affected areas
even before we knew he had cancer- in fact - that is what led us to go
to the vet to get him checked. He was a cat-magnet and every cat in
the neighborhood would come over and buddy up to him- he was constantly
being followed and loved up on by strays. I think they sensed
something was wrong and were looking out for him.

We even had a stray that showed up out of nowhere that would hold him
up when he was too weak to stand, and guide him around the lawn so he
would not bump into anything. As soon as Sammy passed away- the cat
disappeared.

I've noticed that my cats have been smelling my leg ever since I
started having symptoms of DVT. The "CAT" scans came up negative, but
my doc's say that I have all the signs and symptoms of it- Maybe my
little "cat-scans" are better that the ones at the hospital.

Has anyone else had this experience?

If dogs can smell cancer and disease...why not cats?