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ONCOLOGY Vol 11 No 9

Researchers have identified certain T cells that suppress the reproduction of HIV carried within them. These cells, called

It should be noted that the most common presentation of asymptomatic lung cancer is indeed a solitary pulmonary nodule (SPN), but for most symptomatic lung cancers the nodule is at least 3 cm in diameter at the time of initial diagnosis. The author does a good job of providing documentation to refute one of his critical hypotheses, which indicates that "neoplasm can often be strongly suspected or excluded based on the radiologic characteristics of the single pulmonary nodule."

The Society of Surgical Oncology surgical practice guidelines focus on the signs and symptoms of primary cancer, timely evaluation of the symptomatic patient, appropriate preoperative evaluation for extent of disease, and role of the surgeon in diagnosis and treatment. Separate sections on adjuvant therapy, follow-up programs, or management of recurrent cancer have been intentionally omitted. Where appropriate, perioperative adjuvant combined-modality therapy is discussed under surgical management. Each guideline is presented in minimal outline form as a delineation of therapeutic options.

In this article, the authors have done an excellent job in reviewing recent findings regarding prostate-specific antigen (PSA) and other methods for the early detection of prostate cancer. This is a fast-moving field, with new results being reported on a weekly basis. Indeed, it is an exciting time to be conducting research in prostate cancer. At the same time, however, it is far too easy to lose sight of some of the basic principles by which we should judge evidence to make research or clinical decisions. Specifically, there are hard-learned epidemiologic lessons about which we need to constantly remind ourselves.

This review of prostate-specific antigen (PSA) by Pannek and Partin, two experts in the prostate marker field, comes at a very good time-a point at which great changes are occurring after a relatively long period of stability. I expect that this trend will continue. Moreover, given the rapid developments occurring in this area, some of the statements made in both the review and my commentary will probably need to be modified within the next 12 months, with further revisions necessary thereafter.