Clinical Study On Renal Angiomyolipoma

Objective:To improve the diagnosis and treatment of renal angiomyolipoma(RAML).Methods:23 cases of renal angiomyolipoma during July 1991 to August 2007 were reviewed.The manifestations,diagnosis and treatment of renal angiomyolipoma are discussed and compared with pathologycal.Such measures as enucleation and partial or total nephrectomy were taken.Results:15/23 of ultrasonography ,18/23 of computerized tomography,and 5/6 of magnetic resonance imaging were inferred renal angiomyolipoma and 1case of which misdiagnosed as renal cell carcinoma.All the 23 of cases were confirmed by pathology after operation.Conclusions:Renal angiomyolipoma (RAML) is generally benign tumor without specific symptoms and signs.Medical imaging is the most valuable diagnosis procedure.Ultrasonography is convenient screening method while computerized tomography (CT) and magnetic resonance imaging (MRI) scanning are the most reliable diagnostic method.Frozen section is necessary for atypical cases during operation. Immunohistochemistry may improve accuracy. It is widely acceptead that the ultrasonography,in combination of computerized tomography and magnetic resonance imaging is the best method for diagnosing renal angiomyolipoma. Active surgical treatment should be considered to the RAML larger than 4cm or symptomatic RAML smaller than 4cm which has been diagnosed. The operative management should preserve the functional nephronas as much as possible.