Plicae are the remnants of
tissue that normally disappear during fetal development as the synovial
capsule is formed. When this process is not complete, the plicae remain
within the knee, and the knee is vulnerable to chronic overuse and inflammation.
Plica syndrome occurs when bands of synovial tissue, called plicae, become
irritated by overuse or injury.
The symptoms of plica syndrome
include pain and swelling, a "clicking" sensation, and a "locking" or weakness
of the knee. Plica syndrome is often misdiagnosed because of its similarity
to other knee conditions. First aid measures may be effective in reducing
the inflammation, and re-conditioning exercises may be prescribed to strengthen
the supporting muscles.
Cortisone injection may be
helpful in some cases, and an arthroscopic procedure may be recommended
to confirm the diagnosis and further treat the condition. Surgical correction
of the abnormality may be recommended if other measures do not provide
lasting relief.
