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Related Concept Videos

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Papillary Dermis01:11

Papillary Dermis

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Inflammatory Bowel Disease IV: Clinical Manifestations

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Skin Cancer01:30

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Related Experiment Video

Updated: May 25, 2026

Anterior High-Resolution Optical Coherence Tomography in the Diagnosis and Therapeutic Monitoring of Ocular Surface Squamous Neoplasia
06:15

Anterior High-Resolution Optical Coherence Tomography in the Diagnosis and Therapeutic Monitoring of Ocular Surface Squamous Neoplasia

Published on: August 9, 2024

Pigmented villonodular synovitis presenting as a baker cyst.

Rick Tosti1, John D Kelly

  • 1Department of Orthopaedic Surgery and Sports Medicine, Temple University, Philadelphia, Pennsylvania, USA. rtosti@temple.edu

American Journal of Orthopedics (Belle Mead, N.J.)
|January 21, 2012
PubMed
Summary
This summary is machine-generated.

Pigmented villonodular synovitis (PVNS) can mimic other conditions, often delaying diagnosis. Consider PVNS in young adults with a popliteal cyst, even without typical intra-articular signs.

Related Experiment Videos

Last Updated: May 25, 2026

Anterior High-Resolution Optical Coherence Tomography in the Diagnosis and Therapeutic Monitoring of Ocular Surface Squamous Neoplasia
06:15

Anterior High-Resolution Optical Coherence Tomography in the Diagnosis and Therapeutic Monitoring of Ocular Surface Squamous Neoplasia

Published on: August 9, 2024

Area of Science:

  • Orthopedics
  • Rheumatology
  • Oncology

Background:

  • Pigmented villonodular synovitis (PVNS) is a rare, benign neoplastic proliferation of the synovium.
  • PVNS can present insidiously, mimicking various joint pathologies.
  • Diagnostic challenges arise due to non-specific clinical signs like tenderness and effusion.

Observation:

  • PVNS can manifest as a popliteal cyst, potentially masking intra-articular disease.
  • This presentation can divert clinical attention from the primary intra-articular pathology.
  • The case described highlights PVNS presenting solely as a popliteal cyst, unlike other reported instances with cyst stalk involvement.

Findings:

  • The classic presentation of PVNS may not always be evident.
  • A popliteal cyst can be the primary or sole presenting feature of PVNS.
  • PVNS should be suspected in young adults with popliteal cysts, irrespective of intra-articular findings.

Implications:

  • Early consideration of PVNS in patients with popliteal cysts can expedite diagnosis.
  • This broadens the differential diagnosis for popliteal cysts.
  • Improved diagnostic strategies for PVNS may reduce treatment delays and improve patient outcomes.