Hamada Grade (Cuff Tear Arthropathy)
The Hamada classification of rotator cuff tear arthropathy on shoulder radiographs, by the acromiohumeral interval (AHI) and glenohumeral / acromial changes, grades 1/2/3/4/5.
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Hamada grade
- 1 - AHI >= 6 mm
Result: Hamada grade 1: acromiohumeral interval 6 mm or more.
The tool opens with these values already filled in. Replace them with your own.
What the result means
- Grade 1
- Acromiohumeral interval (AHI) 6 mm or more.
- Grade 2
- AHI 5 mm or less.
- Grade 3
- AHI 5 mm or less with acetabularization of the acromion.
- Grade 4
- Glenohumeral joint narrowing (arthritis).
- Grade 5
- Humeral head collapse (osteonecrosis).
What you enter
- Hamada grade
How this is calculated
Hamada K, Fukuda H, Mikasa M, Kobayashi Y. Roentgenographic findings in massive rotator cuff tears. A long-term observation. Clin Orthop Relat Res. 1990;(254):92-96. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.