S
Superficial peroneal nerve
The superficial peroneal nerve is the superficial branch of the common peroneal nerve.
Superior
Superior is a positional word, meaning 'above'.
Suprapatellar
Suprapatellar is a positional adjective describing something to be 'above the patella' (kneecap). Page updated November 2023 by Dr Sheila Strover (Clinical Editor)
Suprapatellar bursa
The suprapatellar bursa is an extension of the joint cavity above the kneecap.
Suprapatellar plica
A suprapatellar plica is a fold of joint lining - possibly an embryonic remnant - that stretches across the joint cavity in the pouch above the kneecap. Page updated June 2024 by Dr Sheila Strover (Clinical Editor)
Suprapatellar pouch
The suprapatellar pouch (suprapatellar recess) is the extension of the knee joint cavity above the patella (kneecap). Page updated January 2024 by Dr Sheila Strover (Clinical Editor)
Surface replacement
A surface replacement involves an implant usually used on the surface of the condyles (end of the femur) or for the damaged kneecap and groove in which the kneecap (patella) runs.
SVF
SVF is an abbreviation of Stromal Vascular Fraction.
Swelling
Swelling of the whole knee or a region of the knee is typically a result of an accumulation of fluid.
Sympathetic nervous system
The sympathetic nervous system is the nerve system that controls things like heart rate and blood pressure.