TASK DEFINITION: In this task, you will be given a sentence. You need to reconize the name of the disorder or disease. Disease is a disorder of structure or function in a human, animal, or plant, especially one that produces specific symptoms or that affects a specific location and is not simply a direct result of physical injury. Although there might be several correct answers, you need to write one of them.
PROBLEM:  Susceptibility to ankylosing spondylitis in twins : the role of genes , HLA , and the environment .

SOLUTION: ankylosing spondylitis

PROBLEM:  In SCA2 , saccade velocity was markedly decreased .

SOLUTION: SCA2

PROBLEM:  Skin fragility in most cases is due to mutations in the gene encoding type XVII collagen ( COL17A1 ) .

SOLUTION:
Skin fragility