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Case Analysis of 14 Children with Malignant Rhabdoid Tumor of the Kidney.
OBJECTIVE: This study aims to summarize the clinical features and prognoses of the malignant rhabdoid tumor of the kidney (MRTK) in children. It further aims to analyze the high-risk factors affecting MRTK prognosis.
METHODS: Clinical data from 14 children with MRTK treated in Paediatrics of Beijing Tongren Hospital from January 2010 to December 2019, along with the high-risk factors affecting prognosis, were retrospectively analyzed.
RESULTS: There were 14 children with MRTK included in the study, with a median onset age of 13 (3-46) months. Thirteen patients had distant metastases, the most common site for metastases being inside the lung. A comprehensive treatment protocol combined with chemotherapy was mainly applied during the surgery. A surgical resection of primary tumors was performed on 13 (13/14) patients, and all 14 children received chemotherapy with ifosfamide + carboplatin + etoposide, ifosfamide + etoposide, and vincristine + pirarubicin + cyclophosphamide regimens, alternately. Three patients received radiotherapy and two received oral targeted drugs after partial response. The median follow-up was after 16.5 months (3-53 months) and the four-year overall survival (OS) was 41.8%. In children aged ≤24 months and children aged >24 months, the two-year OS was 67.2% and 100% (χ2 = 108.998, P<0.05), respectively. In children with Ki 67 > 70% and children with Ki 67 < 70%, the two-year OS was 52.6% and 86.9% (χ2 = 8.544, P = 0.003), respectively. In children with distant metastases and children without distant metastasis, the two-year OS was 70% and 100% (χ2 = 14.239, P<0.05), respectively.
CONCLUSION: The most common MRTK distant metastasis site is the lung. Risk factors for poor MRTK prognoses include an age of <24 months, Ki 67 > 70%, and distant metastases.
METHODS: Clinical data from 14 children with MRTK treated in Paediatrics of Beijing Tongren Hospital from January 2010 to December 2019, along with the high-risk factors affecting prognosis, were retrospectively analyzed.
RESULTS: There were 14 children with MRTK included in the study, with a median onset age of 13 (3-46) months. Thirteen patients had distant metastases, the most common site for metastases being inside the lung. A comprehensive treatment protocol combined with chemotherapy was mainly applied during the surgery. A surgical resection of primary tumors was performed on 13 (13/14) patients, and all 14 children received chemotherapy with ifosfamide + carboplatin + etoposide, ifosfamide + etoposide, and vincristine + pirarubicin + cyclophosphamide regimens, alternately. Three patients received radiotherapy and two received oral targeted drugs after partial response. The median follow-up was after 16.5 months (3-53 months) and the four-year overall survival (OS) was 41.8%. In children aged ≤24 months and children aged >24 months, the two-year OS was 67.2% and 100% (χ2 = 108.998, P<0.05), respectively. In children with Ki 67 > 70% and children with Ki 67 < 70%, the two-year OS was 52.6% and 86.9% (χ2 = 8.544, P = 0.003), respectively. In children with distant metastases and children without distant metastasis, the two-year OS was 70% and 100% (χ2 = 14.239, P<0.05), respectively.
CONCLUSION: The most common MRTK distant metastasis site is the lung. Risk factors for poor MRTK prognoses include an age of <24 months, Ki 67 > 70%, and distant metastases.
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