An adenoma of the anterior lobe of the pituitary gland that produces growth hormone. The vast majority of cases are hormonally functioning and are associated with either gigantism or acromegaly. The disease is growth hormone-producing pituitary gland adenoma (MONDO_0006238, a Monarch Disease Ontology entry). Also known as: GH cell adenoma, Somatotrophinoma, growth hormone producing adenoma of pituitary, growth hormone producing adenoma of pituitary gland, growth hormone producing adenoma of the pituitary, growth hormone producing adenoma of the pituitary gland, growth hormone producing pituitary adenoma, growth hormone producing pituitary gland adenoma.