Spontaneous regression of prolactin-producing pituitary adenomas.

Two women evaluated for amenorrhea, galactorrhea, and hyperprolactinemia had radiographic changes of the sella turcica (localized erosion on trispiral tomography) suggestive of a pituitary tumor. Both patients experienced spontaneous regression of apparent prolactin-secreting adenomas with a marked decrease in the quantity of galactorrhea and a reduction of serum prolactin concentrations to the normal range. One patient noted a marked improvement of headaches and spontaneous menses resumed in the other patient.