Rarer Forms of SMA

Rarer Forms of SMA
SMA is the name given to a number of genetically distinct conditions which all result in muscle weakness, but there’s a great variation in the severity and impact they have. The more common forms of SMA are broadly known as 5q SMA (Types 1, 2, 3 and 4).
This sections brings together the information is available about some other rarer forms of SMA. For some of these, the information is very limited.