Medical Imaging Report
Right knee
MR | T1 Dixon AXI | 2026. május 4.
Explanation for Patients
Right knee arthritis changes with fluid and a likely Baker's cyst
This MRI series of the right knee shows degenerative arthritis-type changes, extra fluid in the knee joint, and a likely fluid-filled Baker's cyst behind the knee. No clear fracture is seen on these images.
Key Points
- There is a moderate-to-large amount of fluid in the knee joint, which can occur with arthritis or inflammation.
- A likely Baker's cyst is present behind the knee, a fluid pocket that often connects with joint swelling.
- There are degenerative arthritis changes with bony spurs around the knee joint.
- No definite acute fracture is visible on this series.
Findings shown on imaging
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Recommended Next Steps
- Discuss these findings with your treating doctor or an orthopedic specialist, especially if you have pain, swelling, or limited motion.
- Review the other MRI series and the study-level summary for assessment of the menisci, ligaments, and cartilage.
- Seek prompt medical care if swelling becomes severe, the calf becomes painful or very swollen, or you develop redness, fever, or inability to bear weight.
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Clinical Summary
Axial T1 Dixon MRI series of the right knee dated 2026-05-04. Interpretation is based on this axial Dixon series, which demonstrates osseous, joint fluid, and soft-tissue findings but is limited for full internal derangement assessment.
Findings
- Moderate-to-large knee joint effusion, most conspicuous in the suprapatellar and patellofemoral recesses, with likely mild synovial thickening/heterogeneity suggesting synovitis.
- Well-defined fluid-signal collection in the posteromedial popliteal fossa at the expected gastrocnemius-semimembranosus bursal location, likely representing a Baker's cyst.
- Tricompartment degenerative osteoarthrosis with marginal osteophytes; axial images suggest patellofemoral chondral irregularity/thinning, though cartilage is not fully characterized on this series.
- No definite acute fracture, dislocation, or aggressive marrow-replacing lesion is identified on the provided images.
- Menisci and cruciate/collateral ligaments are not reliably assessed on this axial T1 Dixon series.
Impression
- Moderate-to-large right knee joint effusion with likely synovitis.
- Likely posteromedial popliteal Baker's cyst.
- Degenerative osteoarthrosis of the right knee.
- No definite acute osseous abnormality visible on this series.
Recommendations
- Correlate with symptoms and physical examination for inflammatory flare, mechanical symptoms, or infection risk if clinically suspected.
- Review complete knee MRI protocol, including sagittal and coronal fluid-sensitive sequences, for meniscal, ligamentous, and cartilage assessment.
- Consider orthopedic or rheumatologic follow-up depending on clinical presentation and severity of symptoms.
Medical AI Disclaimer
This is an AI-generated imaging explanation and is not a diagnosis. It does not replace evaluation by a qualified clinician or formal review by a radiologist, and all available CT/MRI series should be reviewed together.
Important Notes
- A human radiologist should confirm these findings using the complete MRI study.
- Symptoms such as fever, rapidly worsening swelling, severe calf pain, or inability to walk need urgent medical assessment.
- Treatment decisions should be made with your doctor, using the full clinical picture.