MASES Enthesitis Score Calculator

The Maastricht Ankylosing Spondylitis Enthesitis Score (MASES) is a clinical tool used to assess enthesitis in patients with ankylosing spondylitis (AS) and other spondyloarthropathies (SpA). It evaluates 13 sites for tenderness, with each site scored 0 (no tenderness) or 1 (tenderness), for a total score range of 0–13.

Total MASES: 0

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MASES (0–13)

Findings and Scoring

Additional Information and Comments

MASES Enthesitis Score Calculator*
*Adapted as an online calculator by Dr. Ahmed Omar (Rheumatology Division, University of Toronto)

How to use:
Click on the blue number circles to score each enthesitis site:
- One click = 1
- Another click = 0
- Scores toggle with each click

You can hover over each blue circle to reveal the name of the anatomical site before clicking..

Reference:
Heuft-Dorenbosch L, Spoorenberg A, van Tubergen A, Landewé R, van ver Tempel H, Mielants H, Dougados M, van der Heijde D. Assessment of enthesitis in ankylosing spondylitis. Ann Rheum Dis. 2003 Feb;62(2):127-32. doi: 10.1136/ard.62.2.127. PMID: 12525381; PMCID: PMC1754445.

Disclaimer and Privacy
This tool is provided for informational and clinical documentation assistance only. It does not replace professional medical judgment or diagnostic evaluation. Always review and validate all findings before finalizing reports or treatment decisions. If patient information is entered, please ensure compliance with local privacy laws and guidelines (e.g., HIPAA). The anonymization feature is provided to help minimize the risk of patient identification in exported materials.