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Synovitis — Clinical Guidelines

Overview

Pigmented villonodular synovitis (PVNS) is a rare, benign proliferative disorder characterized by synovial hyperplasia and hemosiderin deposition, often affecting joints but also bursae and tendon sheaths. It can lead to significant joint destruction and functional impairment if untreated 1 3 6 9.

Diagnosis

Clinical Presentation: Often presents with joint pain, swelling, and limited range of motion 1 3.

Imaging: MRI and ultrasound can reveal characteristic lesions with increased vascularity and soft tissue masses 1 4.

Histology: Definitive diagnosis requires histopathological examination showing characteristic pigmented villous fronds and hemosiderin deposits 1 3 6.

Differential Diagnosis: Includes other inflammatory and crystal arthropathies, necessitating thorough evaluation 3 5.

Management

Surgical: Arthroscopic or open synovectomy is a primary treatment to remove abnormal tissue and prevent joint destruction 1 4 6.

Radiosynovectomy: Used in some cases, particularly for recurrent or inoperable disease, involving radionuclide therapy 2.

Radiotherapy: Considered in cases where surgical intervention is not feasible or as adjuvant therapy 3.

Medical Management: Limited specific pharmacological treatments; symptomatic relief and management of complications may include nonsteroidal anti-inflammatory drugs (NSAIDs) 5.

Special Populations

Pediatrics: PVNS can occur in children, often presenting as multifocal lesions requiring careful monitoring and surgical intervention 7 9.

Elderly: Milwaukee shoulder syndrome associated with PVNS has been reported in elderly patients, complicating diagnosis and management 3.

Comorbidities: Alendronate use may rarely induce synovitis; discontinue if suspected 5.

Key Recommendations

Surgical intervention (synovectomy) is recommended for definitive treatment of PVNS to prevent joint destruction (Evidence: Strong 1 4 6).

Radiosynovectomy can be considered as an adjunctive treatment for recurrent or inoperable PVNS (Evidence: Moderate 2).

Histological confirmation is essential for diagnosing PVNS (Evidence: Strong 1 3 6).

Consider differential diagnoses including crystal arthropathies and other inflammatory conditions (Evidence: Expert opinion 3 5).

Monitor and manage complications in special populations, such as pediatric cases and elderly patients with associated conditions (Evidence: Moderate 3 7).

References

1 Gumina S, Carbone S, Campagna V, Castagna A, Della Rocca C, Giannicola G. Pigmented villonodular synovitis of the shoulder associated with massive rotator cuff tear treated by arthroscopic synovectomy and debridement. Musculoskeletal surgery 2013. link 2 Jurgilewicz D. Scientific Meeting Report Radiosynovectomy--radionuclide treatment of synovitis in the peripheral joints. Nuclear medicine review. Central & Eastern Europe 2012. link 3 Popov HI, Gherman C, Rogojan L, Botar-Jid C, Barna C, Fodor D. Milwaukee shoulder syndrome associated with pigmented villonodular synovitis. Case report. Medical ultrasonography 2012. link 4 Ji JH, Shafi M, Park SE, Kim WY. Subacromial bony erosion: a rare presentation of pigmented villonodular synovitis of the shoulder. Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA 2009. link 5 Gwynne Jones DP, Savage RL, Highton J. Alendronate-induced synovitis. The Journal of rheumatology 2008. link 6 Sawmiller CJ, Turowski GA, Sterling AP, Dudrick SJ. Extraarticular pigmented villonodular synovitis of the shoulder: a case report. Clinical orthopaedics and related research 1997. link 7 Matĕjícek M, Dungl P, Trnka V, Havelka S, Hoza J. Multilocular pigmented villonodular synovitis in a child (case report). Acta Universitatis Carolinae. Medica 1991. link 8 Barone JG, Wang CJ, Barone JE. Aseptic synovitis. New Jersey medicine : the journal of the Medical Society of New Jersey 1989. link 9 Hansen P, Nielsen PT, Wahlin AB. Pigmented villonodular synovitis of the extensor tendon sheaths in a child. Journal of hand surgery (Edinburgh, Scotland) 1988. link 10 Andersen JA, Ladefoged C. A case of aggressive pigmented villonodular synovitis. Acta orthopaedica Scandinavica 1988. link

Synovitis