The pituitary
gland is the gland involved in gigantism. Gigantism usually occurs in the
development stage of a child. It is a serious condition where the pituitary
gland develops a tumor called adenoma. This pituitary tumor (adenoma) causes
the pituitary gland to secrete too much growth hormone. When too much growth
hormone is secreted, the growth of muscles, bones, and other connective tissues
accelerates. Children who experience this disease often have swelling in their
facial features, excessively large hands and feet with thick fingers and toes.