Subtendinous prepatellar bursa

Looks like

The deepest sac in front of the kneecap, between the quadriceps tendon fibres and the bone.

What it does

Reduces friction on the kneecap surface.

Keeping it well

Swells with the other prepatellar bursae.

Related conditions

• ACL & meniscus injury
• Baker's (popliteal) cyst
• Chronic venous insufficiency
• Gout
• Growing pains
• Haemophilia & bleeding disorders
• Juvenile idiopathic arthritis
• Lyme disease
• Lymphatic filariasis (elephantiasis)
• Lymphoedema
• Marfan syndrome & connective tissue disorders
• Osteoarthritis
• Pseudogout (calcium pyrophosphate disease)
• Psoriatic arthritis
• Reactive arthritis
• Restless legs syndrome
• Rheumatic fever & rheumatic heart disease
• Rheumatoid arthritis
• Septic arthritis
• Systemic lupus erythematosus
• Temporomandibular joint disorder
• Varicose veins