Muscle-eye-brain (MEB) disease with bilateral multicystic leucodystrophy is a form of congenital muscular alpha-dystroglycanopathy with brain and eye anomaly characterized by severe muscle-eye-brain disease-like phenotype associated with macrocephaly and extended bilateral multicystic white matter disease, overlapping with the cerebral findings in patients with megalencephalic leukoencephalopathy with subcortical cysts. [ Orphanet:370997 ]