LAST CHANCE: X-ray Interpretation: Elbow Injuries - Half price course offer ends this Sunday!

Catterall classification of Perthes disease

The Catterall classification of Perthes disease is based on radiographic appearances of the epiphysis and metaphysis visible in osteonecrosis of the femoral head:

  • stage I
    • bone absorption changes visible in the anterior aspect of the epiphysis of femoral head
    • changes are visible best in frog leg lateral view
    • no sclerosis is seen
  • stage II
    • further bone resorption with slight femoral head collapse in the anterior aspect of femoral head
    • sclerosis
  • stage III
    • almost entire femoral head involved in collapse with characteristic head within head appearance
    • sclerosis
  • stage IV
    • complete collapse of femoral head with flattening and formation of dense sclerosis; additional metaphyseal changes may be visible
    • sclerosis
    • posterior remodeling

See also

Article information

rID: 43450
Tag: avn
Synonyms or Alternate Spellings:
  • Catterall classification
  • Cateral classification
  • Catteral classification

ADVERTISEMENT: Supporters see fewer/no ads

Cases and figures

  • Figure 1: Catterall classification
    Drag here to reorder.
  • Updating… Please wait.

     Unable to process the form. Check for errors and try again.

     Thank you for updating your details.