Pigmented Villonodular Synovitis Masquerading as a Metastasis: Imaging Features and Coaxial Needle Biopsy Technique

Iowa Orthop J. 2019;39(2):73-75.

Abstract

Pigmented Villonodular Synovitis (PVNS) of the shoulder is rare. We present a patient with locally recurrent tonsillar squamous cell carcinoma (SCC) and newly identified soft tissue lesion of the right shoulder exhibiting similar focal FDG-PET CT uptake. Biopsy demonstrated features consistent with pigmented villonodular synovitis (PVNS). We discuss imaging features and describe a ' two needle,' coaxial biopsy technique.

Keywords: PVNS; metastasis; mimic; shoulder.

Publication types

  • Case Reports

MeSH terms

  • Biopsy, Needle*
  • Carcinoma, Squamous Cell / diagnostic imaging
  • Carcinoma, Squamous Cell / surgery*
  • Diagnosis, Differential
  • Female
  • Head and Neck Neoplasms / diagnostic imaging
  • Head and Neck Neoplasms / surgery*
  • Humans
  • Incidental Findings
  • Magnetic Resonance Imaging
  • Middle Aged
  • Shoulder / diagnostic imaging
  • Shoulder / pathology*
  • Synovitis, Pigmented Villonodular / diagnostic imaging
  • Synovitis, Pigmented Villonodular / pathology*
  • Tomography, X-Ray Computed
  • Tonsillar Neoplasms / diagnostic imaging
  • Tonsillar Neoplasms / surgery*