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Renal leiomyoma (RL) is a rare benign tumor originating from muscle cells and has been rarely described in the pediatric age-group. A case of a large RL in an 11-year-old girl is reported with a literature review. The girl was admitted for abdominal pain due to mass effect. Contrast-enhanced CT showed a circumscribed low density mass (22 × 19 × 12 cm) arising from the right kidney. A right nephrectomy was performed. The mass was well defined and encapsulated. Only the histopathology and immunohistochemistry confirmed the diagnosis of RL. Even though partial nephrectomy may be possible, radical nephrectomy remains the recommended treatment for large leiomyoma.

Renal leiomyoma (RL) is a rare benign tumor originating from muscle cells and has been rarely described in the pediatric age-group. A case of a large RL in an 11-year-old girl is reported with a literature review. The girl was admitted for abdominal pain due to mass effect. Contrast-enhanced CT showed a circumscribed low density mass (22 × 19 × 12 cm) arising from the right kidney. A right nephrectomy was performed. The mass was well defined and encapsulated. Only the histopathology and immunohistochemistry confirmed the diagnosis of RL. Even though partial nephrectomy may be possible, radical nephrectomy remains the recommended treatment for large leiomyoma. [ABSTRACT FROM AUTHOR]