Mitchell classification of osteonecrosis of the femoral head
Citation, DOI, disclosures and article data
At the time the article was created Pir Abdul Ahad Aziz Qureshi had no recorded disclosures.View Pir Abdul Ahad Aziz Qureshi's current disclosures
At the time the article was last revised Joshua Yap had no financial relationships to ineligible companies to disclose.View Joshua Yap's current disclosures
The Mitchell classification is used to stage osteonecrosis of the femoral head and is based on MRI signal characteristics within the center of the lesion on T1 and T2-weighted images.
On this page:
The lesion is classified into four stages with stage A representing early disease and stage D representing late disease. However, the signal intensity of more than one stage can be found in a single lesion.
signal analogous to that of fat
signal analogous to that of subacute blood
signal analogous to that of fluid/edema
signal analogous to that of fibrosis
History and etymology
This classification was described by D G Mitchell et al. in 1987 1.
- 1. Mitchell DG, Rao VM, Dalinka MK, Spritzer CE, Alavi A, Steinberg ME, Fallon M, Kressel HY. Femoral head avascular necrosis: correlation of MR imaging, radiographic staging, radionuclide imaging, and clinical findings. Radiology. 1987 Mar;162(3):709-15.
- 2. Dähnert W. Radiology review manual. Lippincott Williams & Wilkins; 2011.
- 3. Khanna AJ, Yoon TR, Mont MA, Hungerford DS, Bluemke DA. Femoral Head Osteonecrosis: Detection and Grading by Using a Rapid MR Imaging Protocol 1. Radiology. 2000 Oct;217(1):188-92.