Resumo
Definição
Popliteal cyst (also known as Baker cyst) is the result of an accumulation of joint synovial fluid outside the knee joint; it forms behind the knee in the interval between the semimembranosus and the medial gastrocnemius. This occurs via increased intrasynovial pressure and causes the synovial capsule to bulge at an area where there is a lack of external anatomic support.[1]
The most common underlying conditions that lead to overproduction of synovial fluid include chondral wear (i.e., arthritis) and meniscal tears. [Figure caption and citation for the preceding image starts]: Popliteal cystCreated by BMJ Publishing Group [Citation ends].
História e exame físico
Principais fatores diagnósticos
- popliteal bulge
- knee pain
- leg swelling
- calf tenderness
Outros fatores diagnósticos
- calf ecchymosis
Fatores de risco
- knee joint trauma
- underlying knee joint arthritis or synovitis
- underlying knee joint infection
- increasing age
Investigações diagnósticas
Primeiras investigações a serem solicitadas
- duplex ultrasound of the leg
Investigações a serem consideradas
- MRI of the leg
- CT scan of the leg
- x-ray of the knee
Algoritmo de tratamento
asymptomatic
symptomatic: initial treatment
symptomatic: refractory to initial conservative treatment
Colaboradores
Autores
John D. Kelly IV, MD
Professor of Clinical Orthopaedic Surgery
Director of Sports Shoulder Service
Orthopaedic Surgery
University of Pennsylvania
Philadelphia
PA
Declarações
JDK declares that he has no competing interests.
Agradecimentos
Dr John D. Kelly IV would like to gratefully acknowledge Dr Antonios P. Gasparis and Dr Nicos Labropoulos, previous contributors to this topic.
Declarações
APG declares that he has no competing interests. NL is the author of multiple references cited in this topic.
Revisores
Brian Sabb, DO
Clinical Lecturer II
Orthopedic Radiologist
Department of Radiology
University of Michigan Medical Center
Ann Arbor
MI
Declarações
BS declares that he has no competing interests.
Hill Gaston, MA, PhD, BM BCh, FRCP, FMedSci
Professor of Rheumatology
University of Cambridge
Clinical Director
West Anglia CLRN
Cambridge
UK
Declarações
HG declares that he has no competing interests.
Richard Wakefield, BM, MRCP, MD
Senior Lecturer in Rheumatology
Academic Section of Musculoskeletal Disease
Leeds Institute of Molecular Medicine
Chapel Allerton Hospital
Leeds
UK
Declarações
RW declares that he has no competing interests.
Créditos aos pareceristas
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Declarações
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Referências
Principais artigos
Labropoulos N, Shifrin DA, Paxinos O. New insights into the development of popliteal cysts. Br J Surg. 2004;91:1313-1318. Resumo
Chatzopoulos D, Moralidis E, Markou P, et al. Baker's cysts in knees with chronic osteoarthritic pain: a clinical, ultrasonographic, radiographic and scintigraphic evaluation. Rheumatol Int. 2008 Dec;29(2):141-6. Resumo
American College of Radiology. ACR appropriateness criteria: chronic knee pain. 2018 [internet publication].Texto completo
Artigos de referência
Uma lista completa das fontes referenciadas neste tópico está disponível para os usuários com acesso total ao BMJ Best Practice.
Diagnósticos diferenciais
- Deep vein thrombosis (DVT)
- Popliteal hematoma
- Popliteal muscle tear
Mais Diagnósticos diferenciaisDiretrizes
- Appropriateness criteria: chronic knee pain
Mais Diretrizes
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