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Case Reports
Journal Article
Delayed Metastasis of Clear Cell Sarcoma of Kidney to Bladder After 7 Disease-Free Years.
Fetal and Pediatric Pathology 2018 April
INTRODUCTION: Clear cell sarcoma of the kidney (CCSK) is childhood neoplasm with its own distinctive pattern of metastasis and may appear after a disease free interval of 5 years or more.
MATERIALS AND METHODS: Histopathology and immunohistochemistry were available from the radical nephrectomy and the later partial cystectomy, which was performed after a seven disease-free interval.
RESULTS: The pathologic features of the primary tumor were those of a classic CCSK with a monotypic pattern of uniform rounded to ovoid tumor cells with a background network of delicate blood vessels. By contrast, the bladder recurrence had a myxoid hypocellular appearance (one of the known variant patterns of CCSK). Both tumors displayed immunopositivity for Cyclin-D1 and CD117 with a less intense reaction in the bladder metastasis.
CONCLUSIONS: This case demonstrates that CCSK has the potential to metastasize after a prolonged disease-free interval and may have deceptively bland histopathologic features.
MATERIALS AND METHODS: Histopathology and immunohistochemistry were available from the radical nephrectomy and the later partial cystectomy, which was performed after a seven disease-free interval.
RESULTS: The pathologic features of the primary tumor were those of a classic CCSK with a monotypic pattern of uniform rounded to ovoid tumor cells with a background network of delicate blood vessels. By contrast, the bladder recurrence had a myxoid hypocellular appearance (one of the known variant patterns of CCSK). Both tumors displayed immunopositivity for Cyclin-D1 and CD117 with a less intense reaction in the bladder metastasis.
CONCLUSIONS: This case demonstrates that CCSK has the potential to metastasize after a prolonged disease-free interval and may have deceptively bland histopathologic features.
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