noun
fecal occult blood test; FOBT
Medical screening test that detects hidden blood in stool, often used for colorectal cancer screening.
今年の健康診断で便潜血検査を受けた。
I had a fecal occult blood test at this year's health checkup.
Colorectal cancer screening in general; 便潜血検査 is one specific test method used within such screening.
Compound of 便 (stool), 潜血 (occult blood), and 検査 (test).