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Bizarre parosteal osteochondromatous proliferation (Nora’s lesion) of the hand: management of a rare clinical entity
  1. Adam Tamas Misky1,
  2. David Thomson1 and
  3. Abhilash Jain1,2
  1. 1Department of Plastic and Reconstructive Surgery, Imperial College Healthcare NHS Trust, London, London, UK
  2. 2Botnar Research Centre Institute of Musculoskeletal Sciences, University of Oxford Nuffield Department of Orthopaedics Rheumatology and Musculoskeletal Sciences, Oxford, Oxfordshire, UK
  1. Correspondence to Mr Adam Tamas Misky; adam.misky{at}


Bizarre parosteal osteochondromatous proliferation, or Nora’s lesion, is a rare benign tumour of the bone, most commonly described in the hands and feet. We present the case of a female patient in her 20s attending the hand clinic with a sudden onset, atraumatic swelling on the proximal phalanx of her right ring finger. The patient retains good hand function and remains asymptomatic 3 months after surgical excision. Our case highlights the importance of being aware of this diagnosis and differentiating it from other malignant, as well as benign tumours of the hand.

  • Pathology
  • Radiology
  • Plastic and reconstructive surgery
  • Orthopaedic and trauma surgery

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  • Contributors The following authors were responsible for drafting of the text, sourcing and editing of clinical images, investigation results, drawing original diagrams and algorithms, and critical revision for important intellectual content: ATM, DT and AJ. The following authors gave final approval of the manuscript: ATM, DT and AJ.

  • Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

  • Case reports provide a valuable learning resource for the scientific community and can indicate areas of interest for future research. They should not be used in isolation to guide treatment choices or public health policy.

  • Competing interests None declared.

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