Last reviewed: November 2017
Last updated: June  2016

Summary

Definition

History and exam

Key diagnostic factors

  • popliteal bulge
  • knee pain
  • leg swelling
  • calf tenderness

Other diagnostic factors

  • calf ecchymosis
  • lyme disease

Risk factors

  • knee joint trauma
  • underlying knee joint arthritis or synovitis
  • underlying knee joint infection
  • increasing age

Diagnostic investigations

1st investigations to order

  • duplex ultrasound of the leg
Full details

Investigations to consider

  • MRI of the leg
  • CT scan of the leg
Full details

Treatment algorithm

Contributors

Authors VIEW ALL

Associate Professor of Clinical Orthopaedic Surgery

Director of Sports Shoulder Service

Orthopaedic Surgery

University of Pennsylvania

Philadelphia

PA

Disclosures

JK declares that he has no competing interests.

Dr John Kelly IV would like to gratefully acknowledge Dr Antonios P. Gasparis and Dr Nicos Labropoulos, the previous contributors to this monograph. APG declares that he has no competing interests. NL is the author of multiple references cited in this monograph.

Peer reviewers VIEW ALL

Clinical Lecturer II

Orthopedic Radiologist

Department of Radiology

University of Michigan Medical Center

Ann Arbor

MI

Disclosures

BS declares that he has no competing interests.

Professor of Rheumatology

University of Cambridge

Clinical Director

West Anglia CLRN

Cambridge

UK

Disclosures

HG declares that he has no competing interests.

Senior Lecturer in Rheumatology

Academic Section of Musculoskeletal Disease

Leeds Institute of Molecular Medicine

Chapel Allerton Hospital

Leeds

UK

Disclosures

RW declares that he has no competing interests.

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