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Updated: Mar 30, 2026

Quantitative Magnetic Resonance Imaging of Skeletal Muscle Disease
Published on: December 18, 2016
The adductor magnus "mini-hamstring": MRI appearance and potential pitfalls
Stephen M Broski1, Naveen S Murthy2, Aaron J Krych3
1Department of Radiology, Mayo Clinic, Rochester, MN, USA. broski.stephen@mayo.edu.
The adductor magnus mini hamstring (AMMH) is consistently visible on MRI with varied anatomy. This hamstring tendon is rarely completely torn in avulsion injuries, aiding radiologists in diagnosis.
Area of Science:
- Musculoskeletal Radiology
- Anatomy
- Medical Imaging
Background:
- The adductor magnus mini hamstring (AMMH) is an anatomical structure within the hamstring muscle group.
- Understanding its MRI characteristics is crucial for accurate diagnosis of hamstring injuries.
Purpose of the Study:
- To characterize the MRI appearance of the AMMH.
- To evaluate the AMMH's involvement in hamstring avulsion injuries.
Main Methods:
- Retrospective review of 76 AMMHs in 66 patients undergoing hamstring protocol MRI.
- Musculoskeletal radiologists assessed AMMH anatomy and hamstring avulsion involvement.
Main Results:
- AMMH was visualized or well visualized in 88% of cases.
- Common morphologies included ovoid (73%) and flat/lenticular (21%) tendons.
- The AMMH was intact in 13/17 complete hamstring avulsions, with only 1 complete tear.
Conclusions:
- The AMMH is a consistently found tendon with variable MRI characteristics.
- Its low rate of complete tears in hamstring avulsions necessitates radiologist awareness to prevent misdiagnosis.
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