Gigantism
Excessive growth both in height and specific body parts.
Gigantism with extreme height may be associated with disorders of pituitary gland, which may oversecrete human growth hormone (somatotrophin) during childhood before the bones fuse.
Excessive growth of specific body parts is also a feature of a number of disorders such as the Wiedemann-Beckwith syndrome in which there is macroglossia (an abnormally large tongue)