ISAKOS Classification (Meniscal Tears)
Writes the ISAKOS arthroscopic record of a meniscal tear and derives its Cooper rim-width zone from the findings.
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Meniscus
- Medial meniscus
- Tear depth
- Complete: reaches both surfaces
- Rim width at the outermost zone reached
- 5 mm or more (zone 3, inner third)
- Radial location
- Posterior and middle thirds
- Tear pattern
- Vertical flap
- Tissue quality
- Degenerative
Result: ISAKOS: Complete tear of the medial meniscus, rim width zone 3 (5 mm or more), the posterior and middle thirds, vertical flap pattern, degenerative tissue.
The tool opens with these values already filled in. Replace them with your own.
What you enter
- Meniscus
- Tear depth
- Rim width at the outermost zone reached
- Radial location
- Popliteal hiatus (lateral meniscus only)
- Tear pattern (predominant)
- Tissue quality
How this is calculated
Citation
Anderson AF, Irrgang JJ, Dunn W, et al. Interobserver reliability of the ISAKOS classification of meniscal tears. Am J Sports Med. 2011;39(5):926-932. Sayegh ET, Matzkin E. Clin Orthop Relat Res. 2022;480(1):39-44. Read the sources: Anderson 2011 ↗, Sayegh 2022 ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.