Below is an instruction from Human. Write a response.
    ### Instruction:
    Is Klippel-Trenaunay syndrome inherited ?
    ### Response:
    Klippel-Trenaunay syndrome is almost always sporadic, which means that it occurs in people with no history of the disorder in their family. Studies suggest that the condition may result from gene mutations that are not inherited. These genetic changes, which are called somatic mutations, probably occur very early in development and are present only in certain cells.
    