[A case of renal leiomyosarcoma]

Area of Science:

• Urology
• Oncology
• Pathology

Background:

• Renal leiomyosarcoma is a rare malignant tumor originating from smooth muscle tissue within the kidney.
• Gross hematuria can be an presenting symptom, though often asymptomatic.

Observation:

• A 65-year-old male presented with asymptomatic gross hematuria.
• Excretory pyelography failed to visualize the left kidney.
• Computed tomography revealed a left intrarenal mass.

Findings:

• The patient underwent a left radical nephrectomy.
• Histological examination confirmed the diagnosis of leiomyosarcoma.
• The tumor was likely of renal pelvis origin.

Implications:

• This case highlights the importance of considering rare renal tumors in the differential diagnosis of hematuria.
• Early detection and surgical intervention are crucial for managing renal leiomyosarcoma.
• Further research into the origins and optimal treatment of renal leiomyosarcoma is warranted.