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IgA nephropathy in IgG kappa multiple myeloma
Maria Eduarda Couto1, Domingos Sousa2, Hugo Ferreira3
1Onco-hematology Department, Instituto Português de Oncologia do Porto, FG, EPE.
Porto Biomedical Journal
|October 15, 2021
Summary
Multiple myeloma patients can develop kidney injury from causes beyond the cancer itself. This case shows IgA nephropathy in a multiple myeloma patient, emphasizing the need for broader diagnostic evaluation.
Area of Science:
- Nephrology
- Oncology
- Immunology
Background:
- Multiple myeloma (MM) commonly causes kidney dysfunction through various mechanisms.
- Kidney injury in MM patients can also arise from independent etiologies.
- Distinguishing MM-related kidney disease from other causes is clinically significant.
Purpose of the Study:
- To report a case of IgA nephropathy in a patient with IgG kappa multiple myeloma.
- To highlight the importance of investigating non-MM-related causes of kidney injury in MM patients.
Main Methods:
- Case report of a 54-year-old female diagnosed with IgG kappa MM.
- Evaluation for IgA nephropathy and exclusion of MM progression or other causes of kidney injury.
Main Results:
- The patient was diagnosed with IgA nephropathy without cast nephropathy.
- No criteria for MM progression or alternative causes of kidney injury were identified.
- The findings underscore the complexity of renal complications in MM.
Conclusions:
- Kidney injury in multiple myeloma necessitates comprehensive investigation beyond MM-specific mechanisms.
- Potential causes include drug toxicity, infections, and immune-mediated disorders.
- This case emphasizes the need for a broad differential diagnosis for renal impairment in MM patients.
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