便べん潜せん血けつ

noun

fecal occult blood; FOB

Medical term for blood in stool that is not visibly apparent. Often used in the context of screening tests, such as 便潜血検査.

• 便べん潜せん血けつ検けん査さで陽よう性せいだったので、大だい腸ちょう内ない視し鏡きょう検けん査さを受うけた。

  Since the fecal occult blood test was positive, I underwent a colonoscopy.