Are my testicles black?

My uncle was hospitalised after an annual check-up revealed some unusual growth. His doctor suggested a mini-op to get slices of the tumour for diagnosis, which he promptly did.

The op sent my uncle into a deep sleep for 8 hours. Upon waking he asked my dad, who was by his bed, "Are my testicles black? My testicles, are they black?"

Though my dad was a bit taken aback by the question, he gathered his courage and pulled down his pants and looked.

"No, they look fine to me."

To which, my uncle pulled down the oxygen mask over his face and said, "I meant, are my test results back?"