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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. [ABSTRACT FROM AUTHOR]

Abstract: INTRODUCTION: Leiomyoma of kidney is an exceptional finding in the urinary tract. Though most of these tumors are detected on autopsy, still it remains a diagnostic challenge. PRESENTATION OF CASE: We report three adult cases of renal leiomyoma in our institute who presented with abdominal mass and haematuria in last 8 years. DISCUSSION: Leiomyoma has been reported in other organs but renal leiomyoma is rare tumour, though in autopsy series they are second in order of frequency among the renal mesenchymal neoplasms, and few cases have been described in the literature. Still no Indian experience is evaluated on this rare site of occurrence. CONCLUSION: Considering the difficulty of clinical diagnosis of this tumour, strong suspicion is indicated when a patient presents with voluminous, well circumscribed renal lesions. [Copyright &y& Elsevier]

Abstract: Renal leiomyoma is a rare benign smooth muscle tumor of the kidney. Most cases are reported in adults, with very few cases described in children. We report a case of right renal leiomyoma in a 6-year-old boy which was suspected of being a Wilms tumor. Contrast-enhanced computed tomography could not differentiate leiomyoma in the kidney, and the mass was diagnosed as a Wilms tumor. Right radical nephrectomy was performed. Diagnosis of renal leiomyoma could only be achieved after histopathologic examination and immunohistochemistry. We recommend that total nephrectomy has to be done in most cases of pediatric renal tumors to avoid the risk of malignancy. There may be a role for nephron sparing surgery, provided the tumor is small, and one has a strong suspicion for the lesion being benign. [ABSTRACT FROM AUTHOR]