<prompt> A 35-year-old woman complains of nipple discharge and irregular menses of 5 months duration. Physical examination reveals a milky discharge from both nipples. MRI shows an enlargement of the anterior pituitary. Which of the following is the most likely histologic diagnosis of this patients pituitary tumor?AdenomaChoriostomaHamaomaPapilloma  <response>: Benign tumors arising from a glandular epithelium are termed adenomas. Patients with a prolactin-secreting pituitary adenoma present with amenorrhea and galactorrhea Ectopic islands of normal tissue are called choristomas choice B Localized, disordered differentiation during development results in a hamaoma choice C. Papillomas do not occur in the pituitary choice D. 