Angiomyolipomas may require no treatment if they are asymptomatic, especially if they are solitary and small, reports Radiopaedia.org. Large angiomyolipomas or those causing symptoms such as frequent urinary tract infections, pain or palpable mass may require resection or embolization. Large angiomyolipomas that hemorrhage constitute a medical emergency requiring immediate attention.
Angiomyolipomas are often an incidental finding on diagnostic imaging studies, especially for patients with chronic kidney disease, states Radiopaedia.org. The benign tumors, which are composed of fat, muscle and vascular material, are most commonly found occur in the kidneys, although they may be located in other organs such as the spleen, liver, uterus or lung. They represent the most common type of benign tumor of the kidneys.
Angiomyolipomas can also grow to sufficient sizes to impede functioning of nearby organs. An atypical form, epitheliod angiomyolipoma, may metastasize. This variant form shares some of the characteristics of malignant lesions, notes Radiopaedia.org.
Even when they are asymptomatic, angiomyolipomas should be monitored carefully for growth and other changes. Although they are usually slow-growing, they can develop rapidly in some cases, triggering the need for less conservative treatment. Spontaneous hemorrhage poses the greatest danger for angiomyolipoma patients. Large angiomyolipomas are most associated with rupture and shock due to bleeding, says Radiopaedia.org.