- Bile Reflux
- Binge-eating Disorder
- Bladder Cancer
- Bladder Stones
- Blastocystis Hominis Infection
- Blepharitis
- Blind Loop Syndrome
- Blood count
- Blood in urine (Hematuria)
- Blood Tests
- Bone Cancer
- Bone Metastasis
- Bone Spurs
- Boron
- Botulism
- Brachial Plexus Injury
- Bradycardia
- Brain Aneurysm
- Brain AVM (arteriovenous malformation)
- Brain metastases
