My one year old son has had an MRI done for delayed development. The diagnosis is' significant thinning of hypogenesis corpus callosum" He has not started walking. Sits for a while but tends to fall. Makes sounds like ba, pa, ma and na. Sings aloud. Very active otherwise. Quite social. Gives divine smiles. My doctor says this affects the overall growth of the child. There is no cure for it, he says. Want to know the causes, symptoms, what to expect and possible cures.