Popliteal cyst
A popliteal cyst, better known as Baker’s cyst, is a fluid-filled swelling that is developed at the
back of the knee in the popliteal fossa region.
A baker's cyst is an enlarged bursa that is normally located between the medial head of the
gastrocnemius and a capsular reflection of the semimembranosus, named oblique popliteal
ligament.
Etiology
In 30% of cases, herniation of synovial membrane through posterior part of capsule takes
place.
Escape of fluid through the normal communication of bursa with knee (either semi-
membranosus or medial gastrocnemius) is the other mode.
, Clinical Features
Vague posterior pain
Swelling and a mass in the popliteal space (that disappears on flexion and appears on
extension of knee)
Limited range of motion
Stiffness in the back of the knee sometimes increased by activity
Tightness behind the knee
A popliteal cyst, better known as Baker’s cyst, is a fluid-filled swelling that is developed at the
back of the knee in the popliteal fossa region.
A baker's cyst is an enlarged bursa that is normally located between the medial head of the
gastrocnemius and a capsular reflection of the semimembranosus, named oblique popliteal
ligament.
Etiology
In 30% of cases, herniation of synovial membrane through posterior part of capsule takes
place.
Escape of fluid through the normal communication of bursa with knee (either semi-
membranosus or medial gastrocnemius) is the other mode.
, Clinical Features
Vague posterior pain
Swelling and a mass in the popliteal space (that disappears on flexion and appears on
extension of knee)
Limited range of motion
Stiffness in the back of the knee sometimes increased by activity
Tightness behind the knee
