title: Increased serum lactate dehydrogenase isoenzyme 1 and macro creatine kinase type 2 in a patient with lung cancer.
abstract: A 72-yr-old man, having a lung tumor with metastatic spread to liver and bone, was hospitalized with a lactate dehydrogenase (LD; EC 1.1.1.27) activity and a creatine kinase (CK; EC 2.7.3.2) activity in serum of 30 and 2 times the upper reference limit (URL), respectively. The LD isoenzyme-1/LD activity ratio was 62% (2 times URL). This ratio was maintained throughout hospitalization, during which LD activity increased up to 90 times URL. Macro CK type 2 activity represented almost all of the CK activity, which increased up to 4 times URL during hospitalization. The patient died the 29th day after admission. The enzyme abnormalities were thought to stem from tumor tissue.
authors: Clinical Chemistry Laboratory, Diaconessenhuis, Leiden, The Netherlands.
authors: E G
authors: EG
authors: Lentjes
authors: E T
authors: ET
authors: Backer
mesh_terms: D000368:Aged; D004796:Clinical Enzyme Tests; D003402:Creatine Kinase / Q000097:blood*; D006801:Humans; D007527:Isoenzymes; D007770:L-Lactate Dehydrogenase / Q000097:blood*; D008175:Lung Neoplasms / Q000175:diagnosis*; D008297:Male; D013050:Spectrometry, Fluorescence
chemical_list: D007527:Isoenzymes; D007770:L-Lactate Dehydrogenase; D003402:Creatine Kinase