KLK3 and cancer: In terms of correspondence to cancer type, stomach cancer was found on gastric ultrasonography, lung cancer on chest ultrasonography, and prostate cancer on PSA assessment, whereas a wide variety of cancers were found in 21 patients on abdominal echocardiography (6 patients with renal cancer, 4 with pancreatic cancer, 4 with bladder cancer, 3 with malignant lymphoma, 2 with prostate cancer, and 2 with gastrointestinal cancer).