The risk of hemorrhage is greater in masses with a diameter >4 cm (almost 80% of masses with diameter bigger that 4 cm are symptomatic, bleeding being the main symptom, leading to pain and weakness).
The angiomyolipomas are usually bilateral (found in both kidneys) and multiple, when associated with tuberous sclerosis.
What is suggestive for a tuberous sclerosis is the white or lighter patch of skin you have, and the fact that solitary angiomyolipoma when is not associated with TS is usually found in the right, but not in the left kidney as in your case.
In cases in which patients have recurrent episodes of hemorrhage or massive bleeding, the tumor can be resected.
Renal arterial embolization may also be used to control hemorrhage.
Best wishes!
Marija