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Compatible scales for progressive and additive MRI assessments of haemophilic arthropathy
1Department of Radiology, University Hospital of Lund, Lund, Sweden. bjorn.lundin@skane.se
Abstract:
The international MRI expert subgroup of the International Prophylaxis Study Group (IPSG) has developed a consensus for magnetic resonance imaging (MRI) scales for assessment of haemophilic arthropathy. A MRI scoring scheme including a 10 step progressive scale and a 20 step additive scale with identical definitions of mutual steps is presented. Using the progressive scale, effusion/haemarthrosis can correspond to progressive scores of 1, 2, or 3, and synovial hypertrophy and/or haemosiderin deposition to 4, 5, or 6. The progressive score can be 7 or 8 if there are subchondral cysts and/or surface erosions, and it is 9 or 10 if there is loss of cartilage. Using the additive scale, synovial hypertrophy contributes 1-3 points to the additive score and haemosiderin deposition contributes 1 point. For osteochondral changes, 16 statements are evaluated as to whether they are true or false, and each true statement contributes 1 point to the additive score. The use of these two compatible scales for progressive and additive MRI assessments can facilitate international comparison of data and enhance the accumulation of experience on MRI scoring of haemophilic arthropathy.
Insights
New magnetic resonance imaging (MRI) scales for assessing haemophilic arthropathy have been developed. These standardized MRI scoring systems aim to improve data comparison and research collaboration in haemophilia care.
Area of Science:
- Orthopedics
- Radiology
- Hematology
Background:
- Haemophilic arthropathy is a significant complication of haemophilia, leading to joint damage.
- Standardized assessment methods for haemophilic arthropathy using magnetic resonance imaging (MRI) are needed for consistent evaluation.
Purpose of the Study:
- To present a consensus-developed MRI scoring scheme for assessing haemophilic arthropathy.
- To introduce two compatible MRI scales: a 10-step progressive scale and a 20-step additive scale.
Main Methods:
- Development of a 10-step progressive MRI scale evaluating effusion, synovial hypertrophy, haemosiderin deposition, subchondral cysts, erosions, and cartilage loss.
- Development of a 20-step additive MRI scale assessing synovial hypertrophy, haemosiderin deposition, and osteochondral changes through 16 true/false statements.
Main Results:
- The progressive scale assigns scores based on the severity of haemophilic arthropathy features.
- The additive scale quantifies specific pathological findings with defined point values.
- Both scales share identical definitions for mutual steps, ensuring compatibility.
Conclusions:
- The proposed compatible progressive and additive MRI scales provide a standardized method for assessing haemophilic arthropathy.
- These scales will facilitate international data comparison and enhance research experience in MRI scoring for haemophilic joint disease.
