Synovial metastasis from lung cancer

Area of Science:

• Orthopedic oncology
• Rheumatology
• Pathology

Background:

• Intraarticular masses are uncommon in clinical practice.
• The differential diagnosis for synovial masses is broad, often including neoplastic and proliferative processes.

Purpose of the Study:

• To present a case of metastatic lung carcinoma involving the synovium.
• To emphasize lung cancer as a common cause of synovial metastasis.

Main Methods:

• Case report presentation.
• Review of clinical presentation and diagnostic considerations for intraarticular masses.

Main Results:

• A patient with a history of lung cancer developed a metastatic intraarticular mass.
• Lung carcinoma is the most frequent primary malignancy to metastasize to synovial tissue.
• The knee joint is the most commonly affected joint in such cases.

Conclusions:

• Metastatic disease, particularly from lung cancer, should be considered in the differential diagnosis of intraarticular masses.
• Synovial metastasis from lung carcinoma most commonly affects the knee joint.