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New classification for Freiberg's disease may aid treatment decisions to plan osteotomy
A new classification for Freiberg's disease may aid treatment decisions.
Freiberg's osteochondrosis is an uncommon cause of foot pain. Following a national survey circulated by the British Foot and Ankle Society it was found that no classification is used to guide surgical treatment.
This study by L. Hoggett et al. aimed to create a simple, reproducible CT based classification to preoperatively plan whether an osteotomy is required.
A retrospective review of 24 CT scans of new Freiberg's disease diagnoses over a 10 year period was conducted. These images were assigned a study number and anonymised. The scans were then reviewed in their entirety by three independent specialists who determined whether an osteotomy would be of benefit. The sagittal CT slice that displayed the widest portion of proximal articular margin of the proximal phalanx was identified and divided the articular surface into 2 zones - plantar and dorsal and this formed the basis for the classification. These sagittal slices were then reviewed independently by two surgeons to determine if patients had disease in one or both zones and re reviewed two weeks later to assess intra-observer reliability.
Results:
• All 24 cases involved the second metatarsal.
• From reviewing the sagittal CT slices, it was felt that 18 patients were suitable for osteotomy and 6 were suitable for debridement +/− arthroplasty alone.
• The current classification demonstrated that 18 patients had disease confined to zone 1 only and the remaining patients had disease in both zones.
• Inter-observer reliability assessment had 95.8% agreement (Krippendorff's Alpha 0.897).
• Intra-observer reliability was 100%.
• Correlation of those observed to have isolated zone 1 disease and suitability for osteotomy was absolute (Pearson r = 1).
The authors concluded that early management of Freiberg's osteochondrosis focuses on conservative and non-operative interventions. When considering surgery, this paper displays the way in which the treating surgeon can perform a simple work-up and investigation, with thin slice CT scanning, in order to quantify the necrotic area and in so doing, plan a surgical strategy. This both assists with decision making pre-operatively and pre-operative patient consenting and counselling.
Further reading:
A new classification for Freiberg's disease Lee Hoggett, Nikhil Nanavati, James Cowden, Carolyn Chadwick, Chris Blundell, Howard Davies, Mark B. Davies.
The Foot 51 (2022) 101901
MBBS, Dip. Ortho, DNB ortho, MNAMS
Dr Supreeth D R (MBBS, Dip. Ortho, DNB ortho, MNAMS) is a practicing orthopedician with interest in medical research and publishing articles. He completed MBBS from mysore medical college, dip ortho from Trivandrum medical college and sec. DNB from Manipal Hospital, Bengaluru. He has expirence of 7years in the field of orthopedics. He has presented scientific papers & posters in various state, national and international conferences. His interest in writing articles lead the way to join medical dialogues. He can be contacted at editorial@medicaldialogues.in.
Dr Kamal Kant Kohli-MBBS, DTCD- a chest specialist with more than 30 years of practice and a flair for writing clinical articles, Dr Kamal Kant Kohli joined Medical Dialogues as a Chief Editor of Medical News. Besides writing articles, as an editor, he proofreads and verifies all the medical content published on Medical Dialogues including those coming from journals, studies,medical conferences,guidelines etc. Email: drkohli@medicaldialogues.in. Contact no. 011-43720751