What types of health conditions can be detected in stools and urine? For some conditions there are some obviously visual signs e.g. blood in urine or stools. O

What types of health conditions can be detected in stools and urine? For some conditions there are some obviously visual signs e.g. blood in urine or stools. Or the colour of stool may indicate a condition if it is persistently a very pale colour. But what conditions can be detected in stools and urine that aren't visible by visual diagnosis? The article mentions some cancers but not much detail.