M71.2
Synovial cyst of popliteal space [Baker]
Clinical Classification Guidelines
Excludes Type 1
- synovial cyst of popliteal space with rupture (M66.0)
Medical Intelligence & Overview
A synovial cyst of the popliteal space, commonly known as a Baker's cyst, is a fluid-filled swelling that develops behind the knee. It results from an excess buildup of synovial fluid, which lubricates the knee joint, leading to a visible bulge and potential discomfort. This condition can be associated with various knee problems, including arthritis or cartilage injuries, and may affect the movement and function of the knee.
Causes & Symptoms
Clinical Causes: Increased production of synovial fluid due to knee joint conditions like osteoarthritis or rheumatoid arthritis Knee injuries or trauma that cause inflammation and fluid accumulation Degenerative changes in the knee cartilage Meniscal tears or other structural knee abnormalities Repeated stress or overuse of the knee joint
Key Symptoms: A visible bulge or swelling behind the knee, which may enlarge over time Knee stiffness, especially in the morning or after inactivity Discomfort or fullness in the back of the knee Pain that may worsen with joint activity Limited range of motion or difficulty fully extending or flexing the knee Rarely, the cyst may rupture, causing pain and swelling in the calf
Diagnostic & Treatment
Diagnosis Path: To confirm a diagnosis of a Baker's cyst, healthcare providers typically perform a physical examination, examining the back of the knee for swelling and tenderness. Diagnostic imaging tests are often employed, including:
Treatment Protocols: Treatment options depend on the severity of symptoms and underlying causes. Common approaches include:
Clinical Advice & FAQs
Billing Guidance
Is M71.2 a billable ICD-10 code?
Yes, M71.2 is a specific, billable code that can be used to indicate a diagnosis for reimbursement purposes.
Documentation
How do I report M71.2?
Clinical documentation must specify the nature of Synovial cyst of popliteal space [Baker] and any associated comorbidities for accurate reporting.
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