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Synovial fluid immunocytology in the diagnosis of leukemic synovitis
A G Fam1, C Voorneveld, J B Robinson
1Department of Medicine, Sunnybrook Health Science Centre, University of Toronto, ON, Canada.
Insights
Leukemic synovitis, a rare joint complication of acute lymphoblastic leukemia, can be diagnosed early. Immunocytological analysis of joint fluid identifies leukemic cells, aiding in the diagnosis of leukemic arthritis.
Area of Science:
- Hematology
- Rheumatology
- Immunology
Background:
- Acute lymphoblastic leukemia (ALL) can present with extramedullary manifestations.
- Leukemic involvement of joints (leukemic arthritis) is uncommon but can cause significant morbidity.
Observation:
- A patient presented with symptoms suggestive of joint inflammation.
- Synovial fluid analysis was performed to investigate the cause of synovitis.
Findings:
- Leukemic cells were identified in the synovial fluid using an indirect immunofluorescent technique.
- Monoclonal antibodies targeting early B cell antigens confirmed the presence of leukemic B cells.
Implications:
- Immunocytological analysis of synovial fluid is a valuable tool for diagnosing leukemic synovitis.
- This method may be more sensitive than synovial biopsy for detecting focal leukemic lesions in joints.
- Early diagnosis of leukemic arthritis can lead to prompt treatment and improved patient outcomes.
Abstract:
We describe a patient with leukemic synovitis complicating acute lymphoplastic leukemia. Leukemic cells were identified in the synovial fluid by an indirect immunofluorescent technique using monoclonal antibodies against early B cell antigens. Since focal leukemic lesions may be missed in synovial biopsy specimens, immunocytological analysis of joint fluids may facilitate early diagnosis of leukemic arthritis.