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Nephroid metaplasia of a graft kidney
1Department of Surgery, Taichung Veterans General Hospital, Taiwan, Republic of China.
Background:
Nephroid metaplasia is a benign and rare lesion that is confined to the lamina propria of the urinary tract. The leading cause of these lesions is previous trauma to the urothelium.
Method:
We report a case of nephroid metaplasia of a graft kidney from a living-unrelated donor. This patient presented to our clinics due to painless gross hematuria 1 month after renal transplantation.
Result:
Although malignancy was suspected in the beginning due to a filling defect demonstrated by urography, only percutaneous excision of the tumor was performed to preserve the renal function. However, the pathological result disclosed nephroid metaplasia.
Conclusion:
Hematuria warrant aggressive evaluation because underlying malignancy in a immunocompromised patient might be relatively progressive.