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Mixed connective tissue disease associated with lupus lymphadenitis
S Shiokawa1, M Yasuda, M Kikuchi
1Department of Clinical Immunology, Kyushu University, Oita, Japan.
The Journal of Rheumatology
|January 1, 1993
Summary
Two patients with mixed connective tissue disease (MCTD) presented with lymphadenopathy and necrotizing lesions, mimicking lupus lymphadenitis. Histological lymph node findings were insufficient to differentiate MCTD from systemic lupus erythematosus (SLE).
Area of Science:
- Rheumatology
- Immunology
- Pathology
Background:
- Mixed connective tissue disease (MCTD) is an autoimmune disorder with overlapping features of systemic lupus erythematosus (SLE), systemic sclerosis, and polymyositis.
- Lymphadenopathy is a common clinical manifestation in various autoimmune diseases, including SLE.
- Histopathological examination of lymph nodes plays a role in diagnosing and differentiating autoimmune conditions.
Observation:
- Two cases of MCTD presenting with significant lymphadenopathy at disease onset are described.
- Biopsies of enlarged lymph nodes revealed massive necrotizing lesions with follicular hyperplasia, characteristic of lupus lymphadenitis.
- This specific lymph node pathology is typically associated with SLE, not commonly reported in MCTD.
Findings:
- The observed lymph node histology in these MCTD patients mimicked lupus lymphadenitis.
- The typical finding in MCTD lymph nodes is generally limited to lymphoid hyperplasia.
- These represent the second and third reported instances of MCTD associated with lupus lymphadenitis.
Implications:
- The presence of lupus lymphadenitis in MCTD challenges its diagnostic specificity for SLE.
- Histological lymph node analysis may not be a reliable distinguishing feature between MCTD and SLE in all cases.
- Further research is needed to understand the spectrum of lymph node pathology in MCTD and its relationship to SLE.