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Case Reports
. 2020 Jul-Sep;10(3):45-48.
doi: 10.4103/jwas.jwas_20_22. Epub 2022 May 4.

Localized Pigmented Villonodular Synovitis of the Knee Co-existing with Extra-articular Nodular Synovitis of the Popliteus Tendon Sheath: A Case Report

Qladimeji Ranti Babalola  1 , Bright Igbinoba  1 , S Uwale Eyesan  2 , Kolawole Olanrewaju Aramide  3 , Malomo Oluwabusayomi Oghenerume  1 , Adedamola D Onobinoje  1
Affiliations
Case Reports

Localized Pigmented Villonodular Synovitis of the Knee Co-existing with Extra-articular Nodular Synovitis of the Popliteus Tendon Sheath: A Case Report

Qladimeji Ranti Babalola et al. J West Afr Coll Surg. 2020 Jul-Sep.

Abstract

Pigmented villonodular synovitis (PVNS) is a rare proliferative disorder affecting the synovial membranes of joints, bursae, and tendons. The knee joint is one of the most common locations for an intra-articular type of PVNS and this is usually of the diffuse type of PVNS or diffuse pigmented villonodular synovitis (DPVNS). DPVNS tends to be more associated with affectation of contiguous structures. We report a case of a localized form of the disease affecting the knee joint coexisting with an extra-articular lesion of the same nature involving the popliteus tendon sheath of the same knee. The clinical condition was managed with a combined surgical approach of arthroscopic marginal excision for the intra-articular lesion and excision biopsy for the extra-articular lesion.

Keywords: Extra-articular; intra-articular; nodular synovitis.

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Conflict of interest statement

There are no conflicts of interest.

Figures

Figure 1
Figure 1
Arthroscopic approach to the anterior aspect of the knee joint
Figure 2
Figure 2
Arthroscopic view of the villous projections of the synovium
Figure 3
Figure 3
Open approach to the posterior aspect of the knee to the attached giant cell tumor of popliteus tendon sheath
Figure 4
Figure 4
Excised giant cell tumor of the popliteus tendon sheath
Figure 5
Figure 5
Hyperplastic synovium with papillary projections composed of foamy histiocytes and hemosiderin containing macrophages, large clefts, pseudo-glandular, or alveolar spaces lined by synovial cells, osteoclast-like multinucleated (10–70 nuclei) giant cells, and epithelioid cells
See this image and copyright information in PMC

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