A simple method of estimating the size of large pituitary adenomas.

A method of measuring the volume of large pituitary adenomas is described. Measurements obtained are useful in the follow-up of patients whose tumours are treated by partial excision and radiotherapy. The method is felt also to be useful in judging whether or not a tumour should be designated a giant one thereby aiding management as well as follow-up. The method is simple and easily repeatable.