Multiple drugs
Various toxicities: case reportA 79-year-old man developed rapidly progressive glomerulonephritis due to thrombotic microangiopathy during treatment with gimeracil/oteracil/tegafur for advanced colorectal cancer (stage IIIa). Additionally, he exhibited lack of efficacy while being treated with furosemide, prednisolone and plasma for rapidly progressive glomerulonephritis [not all routes, dosages and outcomes not stated; duration of treatment to reaction onset not stated].The man had type-2 diabetes mellitus and was well controlled without any diabetes medication. Additionally, he had mild diabetic neuropathy. At the age of 78 years, he diagnosed with advanced colorectal cancer (stage IIIa) and was initiated treatment with oral gimeracil/oteracil/tegafur [S-1] 80mg twice daily for 6 months (28 days of 42-day cycle). However, during the treatment, his weight was increased, and leg oedema and abdominal swelling also noticed. Following 6 months of therapy, his serum creatinine level and proteinuria were elevated, and his serum albumin was decreased. Thereby, his gimeracil/oteracil/tegafur therapy was discontinued.Consequently, the man was initiated treatment with 180mg furosemide and 30mg of prednisolone. Although, his serum creatinine continued to elevate, and proteinuria remained in the nephrotic range. Hence, he was hospitalised. During the hospitalisation, he was conscious, and his leg oedema and abdominal swelling also noted. Therefore, he underwent several laboratory investigations, which showed decreased haemoglobin, haematocrit, platelet, total protein, albumin, sodium, calcium and Fe, and increased lactate dehydrogenase, alkaline phosphate, urea nitrogen, uremic acid, glycoalbumin, triglyceride, phosphorus, ferritin, C reactive protein, B-type natriuretic peptide, vascular endothelial growth factor, proteinuria, N-acetyl-beta-Dglucosaminidase and Alpha1-microglobuline. All other laboratory test were with in the normal range. Additionally, serum protein electrophoresis no M-peak, hepatitis B virus and hepatitis C virus antibody found negative; microscopic haematuria 2 +, proteinuria 4.2 g/day and Bence Jones proteinuria was negative. Therefore, a CT scan was performed, which revealed severe ascites, liver atrophy and mildly enlarged spleen. An abdominal ultrasound revealed ascites and liver atrophy with a highly irregular surface, highly blunted edge and mildly coarse texture, the portal vein blows towards the liver, and there was no space occupying lesion was detected. An echocardiogram showed an ejection fraction of 72% and normal wall motion. Subsequently, an aspiration of ascites was performed, which revealed total protein 1.0 g/dL, albumin 0.3 g/dL, and lactate dehydrogenase 68 IU/L, which suggested that ascites were transudative. Eventually, a renal biopsy was performed to understand the reason for proteinuria. Meanwhile, a light microscopic examination of the renal biopsy specimen was performed, which revealed global sclerosis in 2 out of 8 glomeruli which confirmed cores Kimmelstiel-Wil...