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Language: search.filters.language.EnglishSubject: search.filters.subject.nephrotic syndrome

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    Nephrotic Syndrome Induced by Tiopronin in a Male Patient with Cystinuria.
    (Macedonian Academy of Sciences and Arts, 2025-06)
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    Severova Stojanoska, Ana
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    Gjorgjievska, Julija
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    Cystinuria is a rare, lifelong, autosomal recessive disorder characterized by high urine cystine excretion, leading to chronic and recurrent kidney stone formation. This inherited metabolic disorder occurs due to defective cystine, lysine, ornithine, and arginine reabsorption in the brush border membrane of the proximal renal tubule (S3 segment) and the gastrointestinal epithelial cells. Tiopronin is a thiol agent used in the treatment of severe homozygous cystinuria in patients who are resistant to conservative measures. We report an 18-year-old male with cystinuria confirmed by genetic testing, who was treated with conservative measures such as high fluid intake, low sodium diet, and oral potassium citrate since the diagnosis was made at four years of age. However, due to the recurrence of several calculi in both kidneys, tiopronin treatment was initiated at the dose of 250 mg three times a day. After three months of therapy, the patient developed nephrotic syndrome with proteinuria of 6.6 g/l, hypoproteinemia, hyperlipidemia, and edema. Considering the adverse effect of tiopronin, the drug was immediately withdrawn and the patient was managed with human albumin substitution, diuretics, and angiotensin receptor blocker, without corticosteroids. Complete clinical and biochemical remission was achieved within 7 days. Clinicians should be aware of this rare but serious adverse effect of tiopronin, and monitor patients receiving tiopronin carefully for the possible occurrence of edema, proteinuria, with the aim of timely intervention and tiopronin discontinuation.
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    Association Between Membranoproliferative Glomerulonephritis and Colorectal Cancer - A Case Report
    (Macedonian Academy of Sciences and Arts/Walter de Gruyter GmbH, 2024-06-01)
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    Naunovska, Ljupka
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    Suleyman, Sabir
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    Membranoproliferative glomerulonephritis (MPGN) is a rare glomerular disease characterized by mesangial hypercellularity and thickening of the glomerular basement membrane (GBM). MPGN can be idiopathic or associated with malignancy, systemic immune complex disorders and chronic infections. It has rarely been associated with solid organ tumors, such as lung, gastric, breast or prostate cancer. We report a patient with MPGN and coexisting colorectal carcinoma. A 48-year-old man presented with anemia, loss of weight, hypertension, and nephrotic syndrome. The renal biopsy findings were compatible with type 1 MPGN. The antineutrophilic cytoplasmic antibodies, antinuclear antibodies, anti-GBM, serologic markers of hepatitis B and hepatitis C and tumor markers were negative. After ruling out the secondary causes of MPGN, the patient was treated with pulse doses of methylprednisolone and a single dose of cyclophosphamide. However, due to the worsening anemia and rectal bleeding, a colonoscopy was performed, which established a diagnosis of adenocarcinoma of the descending colon. The patient was treated with left hemicolectomy and oral corticosteroids. Within a year after the cancer treatment, the patient experienced a complete resolution of the proteinuria and improvement of the kidney function. Although rare, MPGN can be associated with hematologic malignancies and solid organ tumors. The most common causes of secondary MPGN should be ruled out before starting specific treatment. In our patient, cancer treatment has led to a subsequent remission of the nephrotic syndrome, which indicated that this association was not coincidental but rather causal. In patients with a tumor and concomitant glomerulopathy which is suspected to be paraneoplastic in etiology, the treatment of the underlying malignancy should be prioritized.