Lupus-like
glomerulonephritis is an
immune complex disease with features of
lupus nephritis in the absence of
systemic lupus erythematosus (SLE). We
report a 49-year-old man diagnosed with lupus-like
glomerulonephritis associated with extranodal
marginal zone B-cell lymphoma of
mucosa-associated
lymphoid tissue (MALT). He was admitted to the
hospital for
edema. At admission, the
serum creatinine was 2.2 mg/dL and the
urine protein level was 3.9 mg/day. A renal
biopsy showed features of
lupus nephritis with no clinical or serological evidence of SLE. Extranodal
marginal zone B-cell lymphoma of MALT was discovered concurrently. After successful
chemotherapy, the lupus-like
glomerulonephritis and
lymphoma entered complete remission.