mrcem2-1989

A 65-year-old man comes in with a painful swelling in his right groin. He had an appendicectomy 25 years ago and has no other medical history. You suspect it may be a hernia. The swelling gradually appears when he stands and can be pushed back in a upward and outward direction. It extends into his scrotum and is located above and towards the center of the pubic tubercle.
What is the MOST likely diagnosis?