Long-term course of west syndrome associated with tuberous sclerosis. Epilepsia. 1998;39(Suppl 5):50–4. 31. Chan DL, Calder T, Lawson JA, Mowat D, Kennedy SE. The natural history of subependymal giant cell astrocytomas in tuberous sclerosis complex: a review. Rev Neurosci. 2018;29(3)...