Given below is a set of four terms. In this set, one term is odd and cannot be grouped into the category to which the other three belong. Identify the odd one.
Goitre, Dwarfism, Acromegaly, Cataract
Cataract
Goitre, dwarfism, and acromegaly are all hormonal diseases but cataract is not. Cataract is a clouding of the lens in the eye that affects vision. Most cataracts are related to aging. Cataracts are very common in older people. By age 80, more than half of all Americans either have a cataract or have had cataract surgery.