title: Amyloidosis of heart and liver: comparison of Tc-99m pyrophosphate and Tc-99m methylene diphosphonate for detection.
abstract: A prospective, comparative study was made of the efficacy of technetium-99m pyrophosphate (Tc PYP) and technetium-99m methylene diphosphonate (Tc MDP) in detecting soft-tissue amyloidosis. Tc PYP and Tc MDP scans were obtained within ten-day intervals in seven patients with histologically proven amyloidosis. Tc PYP was a better scanning agent for soft-tissue amyloidosis in all patients. Cardiac and hepatic involvement were proved by autopsy in one patient. Involvement of the heart was confirmed by echocardiography in five patients. The potential use of Tc PYP scanning as a screening test for soft-tissue amyloidosis is discussed.
mesh_terms: D000328:Adult; D000368:Aged; D000686:Amyloidosis / Q000000981:diagnostic imaging*; D001706:Biopsy; D011756:Diphosphates; D004164:Diphosphonates; D004452:Echocardiography; D005260:Female; D006331:Heart Diseases / Q000000981:diagnostic imaging*; D006801:Humans; D008107:Liver Diseases / Q000000981:diagnostic imaging*; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D011877:Radionuclide Imaging; D013667:Technetium; D013669:Technetium Tc 99m Medronate; D016698:Technetium Tc 99m Pyrophosphate
chemical_list: D011756:Diphosphates; D004164:Diphosphonates; D016698:Technetium Tc 99m Pyrophosphate; D013667:Technetium; D013669:Technetium Tc 99m Medronate