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.
3. When ready to cook, place lamb on a wire rack set in a foil-lined rimmed baking sheet. Transfer to oven and roast until an instant read thermometer inserted into coolest section of lamb registers 125Â° to 130Â°F for medium-rare, or 130Â° to 135Â°F for medium, 3 to 3 1/2 hours.Remove from oven and let rest for 40 minutes.hile lamb is resting, increase oven temperature to 500Â°F. Return lamb to oven and roast until exterior is deep brown and crisp, about 15 minutes. Remove from oven and let rest 5 minutes. Remove twine with kitchen shears, transfer lamb to cutting board, slice into 1/4 inch slices, and serve.