TY - JOUR
T1 - Clinicopathologic correlations in multiple myeloma
T2 - A case series of 190 patients with kidney biopsies
AU - Nasr, Samih H.
AU - Valeri, Anthony M.
AU - Sethi, Sanjeev
AU - Fidler, Mary E.
AU - Cornell, Lynn D.
AU - Gertz, Morie A.
AU - Lacy, Martha
AU - Dispenzieri, Angela
AU - Rajkumar, S. Vincent
AU - Kyle, Robert A.
AU - Leung, Nelson
PY - 2012/6
Y1 - 2012/6
N2 - Background: Renal involvement is common in multiple myeloma. In this study, we examined kidney biopsy findings in patients with multiple myeloma and correlated them with their clinical renal and hematologic characteristics. Study Design: Case series. Setting & Participants: 190 Mayo Clinic patients with multiple myeloma who underwent kidney biopsy between 1997-2011 were identified from our kidney biopsy database. Patients had an established diagnosis of multiple myeloma or multiple myeloma was diagnosed shortly after the results of kidney biopsy, which prompted bone marrow biopsy. Predictors: Myeloma cast nephropathy (MCN), AL amyloidosis, and monoclonal immunoglobulin deposition disease (MIDD). Outcomes & Measurements: Renal morphologic changes, clinical renal and hematologic characteristics at kidney biopsy, renal and patient outcomes. Results: Paraprotein-associated lesions were seen in 73% of patients; non-paraprotein-associated lesions, in 25%; and no pathology, in 2%. The most common paraprotein-associated lesions were MCN (33%), MIDD (22%), and amyloidosis (21%). The most common non-paraprotein-associated lesions were acute tubular necrosis (9%), hypertensive arteriosclerosis (6%), and diabetic nephropathy (5%). Patients with MIDD were younger than those with MCN or amyloidosis. Urine paraprotein size and bone marrow plasma cell percentage were higher in MCN than amyloidosis or MIDD. Nephrotic syndrome was more common in amyloidosis than MIDD. Percentage of albuminuria was highest in amyloidosis and lowest in MCN. Median kidney survival from kidney biopsy was 20, 30, and 51 months for MCN, amyloidosis, and MIDD, respectively (P = 0.2). Median patient survival from multiple myeloma diagnosis was 44, 58, and 62 months for MCN, amyloidosis, and MIDD, respectively (P = 0.4). Limitations: Retrospective nature. Conclusions: The spectrum of renal lesions in multiple myeloma is more heterogeneous than previously reported. Clinical features favoring amyloidosis over MIDD include older age, absence of kidney failure, presence of nephrotic syndrome, absence of hematuria, and >50% albuminuria.
AB - Background: Renal involvement is common in multiple myeloma. In this study, we examined kidney biopsy findings in patients with multiple myeloma and correlated them with their clinical renal and hematologic characteristics. Study Design: Case series. Setting & Participants: 190 Mayo Clinic patients with multiple myeloma who underwent kidney biopsy between 1997-2011 were identified from our kidney biopsy database. Patients had an established diagnosis of multiple myeloma or multiple myeloma was diagnosed shortly after the results of kidney biopsy, which prompted bone marrow biopsy. Predictors: Myeloma cast nephropathy (MCN), AL amyloidosis, and monoclonal immunoglobulin deposition disease (MIDD). Outcomes & Measurements: Renal morphologic changes, clinical renal and hematologic characteristics at kidney biopsy, renal and patient outcomes. Results: Paraprotein-associated lesions were seen in 73% of patients; non-paraprotein-associated lesions, in 25%; and no pathology, in 2%. The most common paraprotein-associated lesions were MCN (33%), MIDD (22%), and amyloidosis (21%). The most common non-paraprotein-associated lesions were acute tubular necrosis (9%), hypertensive arteriosclerosis (6%), and diabetic nephropathy (5%). Patients with MIDD were younger than those with MCN or amyloidosis. Urine paraprotein size and bone marrow plasma cell percentage were higher in MCN than amyloidosis or MIDD. Nephrotic syndrome was more common in amyloidosis than MIDD. Percentage of albuminuria was highest in amyloidosis and lowest in MCN. Median kidney survival from kidney biopsy was 20, 30, and 51 months for MCN, amyloidosis, and MIDD, respectively (P = 0.2). Median patient survival from multiple myeloma diagnosis was 44, 58, and 62 months for MCN, amyloidosis, and MIDD, respectively (P = 0.4). Limitations: Retrospective nature. Conclusions: The spectrum of renal lesions in multiple myeloma is more heterogeneous than previously reported. Clinical features favoring amyloidosis over MIDD include older age, absence of kidney failure, presence of nephrotic syndrome, absence of hematuria, and >50% albuminuria.
KW - Multiple myeloma
KW - amyloidosis
KW - monoclonal immunoglobulin deposition disease
KW - renal biopsy
UR - http://www.scopus.com/inward/record.url?scp=84861348185&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84861348185&partnerID=8YFLogxK
U2 - 10.1053/j.ajkd.2011.12.028
DO - 10.1053/j.ajkd.2011.12.028
M3 - Article
C2 - 22417785
AN - SCOPUS:84861348185
SN - 0272-6386
VL - 59
SP - 786
EP - 794
JO - American Journal of Kidney Diseases
JF - American Journal of Kidney Diseases
IS - 6
ER -