- Kawasaki disease
- Keratoconus
- Kidney – acute kidney injury
- Kidney disease
- Kidney disease – renal failure
- Kidney function blood test – basic information
- Kidney function blood test – in-depth information
- Kidney health
- Kidney infection
- Kidney protection
- Kidney stones
- Kidneys – how they work
- Knee arthritis
- Knee replacement
- Knee surgery – alternatives