Osteoarthritis hip - grading

Osteoarthritis of the hip can be graded according to severity on imaging.

Conventional radiograph grading
  • grade 0: normal
  • grade 1: possible joint space narrowing and subtle osteophytes
  • grade 2: definite joint space narrowing, defined osteophytes and some sclerosis, especially in the acetabular region
  • grade 3: marked joint space narrowing, small osteophytes, some sclerosis and cyst formation and deformity of femoral head and acetabulum
  • grade 4: gross loss of joint space with above features plus large osteophytes and increased deformity of the femoral head and acetabulum
 MRI grading
  • grade 0: normal
  • grade 1: inhomogeneous high signal intensity in cartilage (T2WI)
  • grade 2: inhomogeneity with areas of high signal intensity in articular cartilage (T2WI); indistinct trabeculae or signal intensity loss in femoral head & neck (T1WI)
  • grade 3: criteria of grade 1 and 2 plus indistinct zone between femoral head & acetabulum; subchondral signal loss due to bone sclerosis
  • grade 4: above criteria plus femoral head deformity

Arthritides
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Article Information

rID: 6310
System: Musculoskeletal
Section: Staging
Tags: staging, refs, hip
Synonyms or Alternate Spellings:
  • Osteoarthritis Hip - Staging
  • Osteoarthritis hip - grading
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    Case 1: grade 3 on CT
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    Case 2: grade 3 on plain film
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    Case 3: grade 2
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