The authors report their experience of 11 cases of renal angiomyolipoma over an 
interval of 20 years, observed in 10 women (90.9%) and one man (9.1%) with a 
mean age of 46 years (range: 21 to 63). Clinical symptoms were dominated by loin 
pain (100%), haematuria (45.4%), lumbar mass (72.7%), fever (18%). In one woman, 
AML was associated with "tuberous sclerosis". Preoperatively, the diagnosis was 
established by ultrasound and CT scan in 45.4% of patients. The size of the 
tumour varied from 7 to 14 cm in 10 patients and in one patient was only about 
3.6 cm. Two women had bilateral tumours. Treatment consisted of total 
nephrectomy in 7 patients, partial nephrectomy in 3 patients and tumourectomy in 
one patient. The purpose of this study is to analyse the epidemiologic, 
diagnostic and therapeutic aspects of this disease.