Renal Involvement as a Presenting Feature of Multiple Myeloma

Area of Science:

• Nephrology
• Hematology
• Oncology

Background:

• Renal involvement is a frequent presenting feature and key manifestation in multiple myeloma.
• Understanding the pattern and associations of renal complications is crucial for patient management.

Purpose of the Study:

• To determine the pattern of renal involvement at the time of multiple myeloma diagnosis.
• To explore associations between renal involvement and clinical, laboratory, and pathological features.

Main Methods:

• A cross-sectional study of 47 newly diagnosed multiple myeloma patients with renal involvement.
• Data collection included clinical, laboratory, and pathological findings, with renal biopsy in suitable patients.
• Statistical analysis was performed using SPSS version 23.

Main Results:

• Renal impairment (70%), proteinuria (79%), and microscopic hematuria (19%) were prevalent. Median serum creatinine was 256 μmol/l.
• Significant associations were found between renal impairment and hypercalcemia (36%), NSAID use (67%), hyperuricemia (49%), and Bence Jones proteinuria (27%).
• Renal biopsy revealed myeloma cast nephropathy (30%) and amyloidosis (30%) as common pathologies.

Conclusions:

• Renal involvement is a common and severe complication of multiple myeloma.
• Factors like NSAID use, hypercalcemia, hyperuricemia, and Bence Jones proteinuria are strongly associated with renal impairment.
• Early identification and management of these factors are critical for improving outcomes in multiple myeloma patients with kidney disease.