Gigantism (from Greek gigas, gigantos "giant") is a condition characterized by excessive height growth. Gigantism (or giantism) is not a currently used medical term and there is no precise definition of the degree of tallness which qualifies a person to be termed a "giant." The term has been typically applied to those whose height is not just in the upper 1% of the population but several standard deviations above mean for persons of the same sex, age, and ethnic ancestry. ...