UCSD Musculoskeletal Radiology bonepit.com MSK Classifications

Fredericson MRI classification of medial tibial stress syndrome
 

• grade 1: periosteal oedema only
• grade 2: bone marrow oedema appreciated only on T2-weighted sequences
• grade 3: bone marrow oedema appreciated on both T1 and T2-weighted sequences
• grade 4
  • 4a: multiple discrete areas of intracortical signal changes
    • 4b: linear area(s) of intracortical signal change correlating with a frank stress fracture