<Tr> <Th> Phenotype </Th> <Th> Description </Th> <Th> Onset </Th> <Th> Approximate Relative Frequency </Th> </Tr> <Tr> <Td> Childhood cerebral </Td> <Td> Progressive neurodegenerative decline, leading to a vegetative state without treatment </Td> <Td> 3--10 years </Td> <Td> 31--35% </Td> </Tr> <Tr> <Td> Adolescent </Td> <Td> Similar to childhood cerebral, with a slower progression </Td> <Td> 11--21 years </Td> <Td> 4--7% </Td> </Tr> <Tr> <Td> Adrenomyeloneuropathy (AMN) </Td> <Td> Progressive neuropathy, paraparesis; approximately 40% progress to cerebral involvement </Td> <Td> 21--37 years </Td> <Td> 40--46% </Td> </Tr>

The ald blood test is done specifically for muscle disorders