A parietal cell antibody test may be used along with or following an intrinsic factor antibody test to help determine the cause of a vitamin B12 deficiency and to help confirm a diagnosis of pernicious anemia.
1 Place leg of lamb on a rack in a roasting pan. 2  Preheat oven to 325 degrees and bake leg of lamb uncovered for 30 minutes per pound or until internal temperature reaches 120 to 130 degrees at the thickest point. Preheat oven to 325 degrees and bake leg of lamb uncovered for 30 minutes per pound or until internal temperature reaches 120 to 130 degrees at the thickest point.
1 Pour red wine into the roasting pan. 2  Cook the lamb for 25 minutes at 425Â°F then turn the oven temperature down to 375Â°F and continue to roast until a meat thermometer reads 145Â°F (for medium-rare) to 160Â°F (for medium), about an hour and a half.hould you choose to use a boneless leg of lamb, apply the same method of preparation but adjust the cooking time slightly. For a rare to medium-rare roast, your meat thermometer should read 135Â°F. 1  Let your leg of lamb sit at room temperature for an hour before you plan to cook it.