MB and neoplasm: In clinical practice, myocardial injury is commonly screened using electrocardiograms and high-sensitivity troponin, but tumor patients may present with abnormalities in myocardial enzymes-a routine panel including creatine kinase (CK), CK-MB isoenzyme, lactate dehydrogenase (LDH), hydroxybutyrate dehydrogenase (HBDH), and myoglobin (MYO)-without corresponding ECG or troponin changes.