The following material was used as a source in the preparation of the 24th edition, without the inclusion of an appropriate acknowledgement in the text.

'Neurosurgery & Surgery of the Pituitary' from Current Surgical Diagnosis and Treatment, 8th edition, edited by Lawrence W. Way, pp 738-786; published in 1988 by Appleton & Lange.

We would like to extend our apologies to all parties involved, and in particular to Lawrence W. Way MD, Julian T. Hoff MD (deceased), Lawrence H. Pitts MD, Roland K. Perkins MD, Michael S. Edwards MD, Barton A. Brown MD, Charles B. Wilson MD, and to the current Publisher of the Series McGraw Hill Professional.

We would also like to thank Sushil Dawka MD for bringing this omission to our attention.