Top sirloin steak by John Spottiswood.

Some top sirloin steaks are wonderfully juicy and flavorful but others are mediocre, so this is a risky steak to buy. Don't confuse this with an ordinary sirloin steak, which includes a bone. American butchers call a thick top sirloin steak a chateaubriand, although the French reserve that term for a much better cut from the tenderloin.