Like other portions of the brain the pituitary body is subject to
degenerations and diseases of various kinds. This is particularly
mentioned here because of the occasional association of its hypertrophy
with the trophic processes of different parts of the body. Along with an
over-development of the limbs, and less frequently of the body, an
enormous increase of the hypophysis has been found, and the one
condition has naturally been set down as the result of the other. In
some such instances, of overgrowth, however, some other blood glands,
such as the thyroid or thymus, have been found to be hypertrophied, so
that at present it is difficult to do more than notice the association
observed between the two conditions.