The article is titled Long-Term Consequences of Castration in Men: Lessons from the Skoptzy and the Eunuchs of the Chinese and Ottoman Courts by Jean D. Wilson and Claus Roehrborn. It was published in The Journal of Clinical Endocrinology & Metabolism Vol. 84 (1999), No. 12, pp. 4324-4331.
The article is an excellent survey of some of the health consequences of castration and includes a table and some plates. This is a MUST READ article for anyone seriously considering castration.
While the text could be copied and pasted here, the table and plates could not be. Neither could be the interactive bibliography. Go to the original source by clicking on the link that Kelly has provided.