An adenoma or carcinoma of the anterior lobe of the pituitary gland that produces prolactin. The disease is prolactin producing pituitary tumor (MONDO_0003430). Also known as: PRL producing pituitary gland neoplasm, prolactin producing neoplasm of pituitary, prolactin producing neoplasm of pituitary gland, prolactin producing neoplasm of the pituitary, prolactin producing neoplasm of the pituitary gland, prolactin producing pituitary gland neoplasm, prolactin producing pituitary gland tumor, prolactin producing pituitary gland tumour.