To the Editor: Roger K. Blashfield, Ph.D., and Vincent Intoccia, B.A. (1), after a search of MEDLINE, 1966–1995, reported that the growth rate in the literature on personality disorders has not increased since the introduction of DSM-III. There are problems involved in the methodology chosen. The leading journals in the field, Personality and Individual Differences, official journal of the International Society for the Study of Individual Differences (founded in 1983), and the Journal of Personality Disorders, official journal of the International Society for the Study of Personality Disorders (founded in 1988), are indexed in a variety of databases but not in MEDLINE. Thus, MEDLINE seems to be an insufficient source from which to elucidate the growth of literature in the field. Furthermore, the MeSH heading "personality disorder" in MEDLINE is not used to cover personality disorders as they are usually defined in the literature. Furthermore, the MeSH headings of individual personality disorders have been imprecise and have changed during the years. Dr. Blashfield and Mr. Intoccia (1) had to search for individual personality disorders and total them. However, it has been more common to use broad personality questionnaires to cover all personality disorders, and often individual personality disorders are not reported in the title or as key words.