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Paraneoplastic pemphigus associated with Castleman's tumour
S Caneppele1, N Picart, P Bayle-Lebey
1Service de Dermatologie du Pr J. Bazex, Hôpital Purpan, Toulouse, Cedex, France. bazex.j@chutoulouse.fr
Clinical and Experimental Dermatology
|June 9, 2000
Summary
This study details a rare case of paraneoplastic pemphigus linked to Castleman's disease. Immunoblotting with cow tongue extract proved crucial for diagnosis, highlighting its utility in similar challenging cases.
Area of Science:
- Dermatology
- Oncology
- Immunology
Background:
- Paraneoplastic pemphigus (PNP) is a rare autoimmune blistering disease often associated with hematological malignancies.
- Castleman's disease is a rare lymphoproliferative disorder that has been infrequently linked to PNP.
Observation:
- A patient presented with severe stomatitis and vulvar erosions, followed by a polymorphous skin rash.
- Diagnostic workup revealed a Castleman's tumor, leading to a suspected diagnosis of PNP.
- Immunoblotting using cow tongue extract confirmed the diagnosis, as keratinocyte extracts were unrevealing.
Findings:
- The patient underwent surgical excision of the Castleman's tumor.
- One year post-surgery, the patient still experienced persistent oral erosions and lymphopenia.
- This case represents the second reported instance of PNP associated with Castleman's disease.
Implications:
- This case highlights the diagnostic value of cow tongue immunoblotting in suspected PNP, especially when conventional methods fail.
- The prolonged evolution of symptoms before tumor discovery underscores the importance of considering rare associations in autoimmune blistering diseases.
- Further research into the pathogenic mechanisms linking Castleman's disease and PNP may improve patient outcomes.