RESUMO
BACKGROUND: Malignant neoplasms of the kidneys are among the 10 most common oncological diseases in Russia, in which various kidney lesions can occur, including glomerulopathy. Glomerular pathology can be an independent nosology, a manifestation of paraneoplastic syndrome or metabolic disturbances. OBJECTIVE: Evaluation of the incidence and structure of glomerulopathies in patients with kidney neoplasms. MATERIAL AND METHODS: We analyzed 141 samples with a tumor obtained during nephrectomy. To diagnose glomerular pathology, a fragment of the kidney parenchyma was examined at a distance of at least 4 cm from the tumor border. Histological slides were stained with hematoxylin and eosin, methenamine silver, trichrome Masson, Congo red, PAS reaction was performed. Immunofluorescent microscopy was performed with antibodies to IgA, IgG, IgM, C3c, C1q, Kappa light chain and Lambda light chain. Samples for electron microscopy were contrasted with a solution of 0.1% lead citrate. RESULTS: Malignant neoplasms were diagnosed in 130 (92.2%) patients, benign ones - in 11 (7.8%) patients. In 59 patients with kidney tumors, glomerulopathies were detected, which amounted to 41.8%. All cases of glomerulopathies were diagnosed in combination with carcinomas of the kidneys and renal pelvis. Among 59 cases of glomerulopathy, diabetic nephropathy was diagnosed in 44 (74.6%) cases, IgA nephropathy - in 7 (11.9%) cases, membranous nephropathy - in 1 (1.6%), minimal change disease - in 2 (3.4%), focal segmental glomerulosclerosis - in 5 (8.5%). CONCLUSION: The study demonstrates a high incidence of glomerulopathies in patients with malignant kidney tumors. The performed work emphasizes the importance of an in-depth morphological study of the kidneys in the presence of a tumor with an integrated approach to the treatment of patients.
