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[Renal angiomyolipoma: presentation, treatment and results of 20 cases].

INTRODUCTION
Renal angiomyolipoma is a benign tumour, but its spontaneous rupture may become threatening for patient's live. Both surgery and selective arterial embolization are accepted treatments for this lesion.


OBJECTIVES
Analyze renal angyolipoma treated in our center, their clinical outcome and treatment purposed in each case.


MATERIAL AND METHODS
We retrospectively analyse 20 cases of patients with renal angiomyolipoma treated in our centre from March 1996 to March 2006. We describe tumour characteristics, treatment followed and results obtained.


RESULTS
Patients suffering from tuberous sclerosis (20%) showed multiple bilateral tumours, with size similar to the rest of patients. Diagnosis of tuberous sclerosis was the only factor attached to spontaneous rupture of those lesions. Four of 9 emergency embolized patients (44.4%) required from second treatment because of recurrent haemorrhage, and 4 of the 16 embolization episodes (25%) presented post-embolization syndrome, both with no predicting factors attached. Reduction of less than one third of the inicial diameter was observed in 58.4% of embolized tumours, which used to be multiple, bilateral and of size larger to the rest. No significative differences were observed in plasmatic creatinine after and before treatments.


CONCLUSIONS
Renal angiomyolipoma may behave in an aggressive way in patients with tuberous sclerosis. No predicting factors of recurrent haemorrhage or post-embolization syndrome were observed. Both surgery and arterial embolization have proved not to compromise renal function in treated patients.