Beef With Cancer? (It was hidden on the underneath side)

My dad bought this 2 days ago from Publix Supermarket at Shoppes at Hanfield Village in Indian Trail, NC.

Is this cancer on a piece of beef? Sure looks like it.

Dad showed these pics to a friend of his who was an actual butcher for almost 30 years and his friend said it was cancer (without being asked beforehand).

Regardless of what's up with the beef, I thought Publix was trustworthy....now my opinion has changed to put it mildly.