Prevalence of Renal Angiomyolipomas and Spontaneous Bleeding Related to Angiomyolipomas in Tuberous Sclerosis Complex Patients in France and Norway-a Questionnaire Study.

Objective: To estimate the prevalence of renal angiomyolipomas (AMLs) and AML-related bleedings among patients with tuberous sclerosis complex and to gather information about associated treatments.

Methods: A questionnaire survey was undertaken by the French Reference Centre for Tuberous Sclerosis Complex and distributed through university hospitals and the patients' association (2009-2011). The questionnaire was then distributed to patients registered by the Norwegian National Centre for Rare Epilepsy-Related Disorders (2013-2014).