2024年5月21日 · The ARCO classification (Association Research Circulation Osseous classification) is one of the staging systems used to assess femoral head osteonecrosis. It was created in 1994 and periodically revised. The revision from 2019 2 includes using radiographs and MRIs. plain radiograph: normal.

2017年3月18日 · Stage 1: A band lesion of a low signal intensity around the necrotic area is seen on MRI scans. No changes are seen on plain radiographs. Stage 2: Subtle signs of osteosclerosis, focal osteoporosis, or cystic change can be identified in the femoral head on plain radiographs. Still there is no evidence of subchondral fracture.

The 2019 updated version of the ARCO staging system was presented and approved on May 3, 2019, at the 2019 ARCO conference in Dalian, China . ARCO staging is more systematic, comprehensive, and practical than any previous staging method and is of great value in diagnosis and assessment of treatment efficacy and prognosis.

In the 2019 revised ARCO staging system, stage 0 is deleted, stage III is divided into early (IIIA) and late stage (IIIB) according to the depth (2 mm) of head depression, and subclassification of location and size is not incorporated. ARCO recommends that clinician and researchers use the 2019 revised ARCO staging system for ONFH studies.

In 2019, ARCO revised the staging system. In the first version, marrow necrosis was defined as stage 0 (marrow necrosis without reparative process, no low-signal band on magnetic resonance imaging [MRI]).

2019年9月9日 · In the 2019 revised ARCO staging system, stage 0 is deleted, stage III is divided into early (IIIA) and late stage (IIIB) according to the depth (2 mm) of head depression, and subclassification of location and size is not incorporated. ARCO recommends that clinician and researchers use the 2019 revised ARCO staging system for ONFH studies.

... newly released 2019 updated version of Association Research Circulation Osseous (ARCO) staging system is recommended (Table 1). ... Подобная необходимость продиктована указанием на наличие...

The features of revised ARCO staging system includes the following items, abolition of stage 0, defining stage I and II as pre-collapse lesions, subgrouping stage III as early and late stage, X-ray evidence of osteoarthritis with accompanying joint space narrowing, acetabular changes and joint destruction classified as stage IV.

A staging system has been developed to revise the 1994 ARCO classification for ONFH by an expert panel-based Delphi survey. ARCO approved and recommends this revised system as a universal staging of ONFH.

ARCO 2019 Revised Staging System - StatPearls [Table], Table 4. ARCO 2019 Revised Staging System - StatPearls. Your browsing activity is empty. Activity recording is turned off. Turn recording back on. See more... Follow NCBI. Connect with NLM. National Library of Medicine 8600 Rockville Pike Bethesda, MD 20894 ...