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ONCOLOGY Vol 10 No 7

Dr. Roach initiates his discussion with the relevant statement that how we detect, stage, and treat carcinoma of the prostate, as well as subsequently evaluate treatment efficacy, has forever been dramatically altered by the availability of prostate specific antigen (PSA), which has been labeled "the most useful tumor marker available" [1]. However, as Dr. Roach also notes, new information and insights generate new questions and uncertainties about the best applications of this valuable tumor marker.

Pretreatment prostate-specific antigen (PSA) level is the single most important prognostic factor for patients undergoing radiotherapy for clinically localized prostate cancer. When combined with Gleason score and T-stage, pretreatment PSA enhances our ability to accurately predict pathologic stage. Patients with pretreatment PSA levels more than 10 ng/mL are at high risk for biochemical failure when treated with conventional radiation alone. A PSA nadir of more than 1 ng/mL and a post-treatment PSA more than 1.5 ng/mL are associated with a high risk of biochemical failure. Postoperative radiotherapy delivered while the tumor burden is low (eg, PSA less than 1 ng/mL) predicts a favorable outcome. Many of these conclusions about the usefulness of pretreatment PSA are based on the assumption that PSA can be used as a surrogate end point for disease-free and overall survival from prostate cancer. However, this assumption still remains to be validated by phase III trials. [ONCOLOGY 10(8):1143-1153, 1996]

Radical radiation therapy and radical prostatectomy are the two most commonly employed therapeutic alternatives for clinically localized (T1-T2,NX,M0) prostate cancer. A vigorous debate is ongoing about the relative efficacy of each modality. This debate centers around the percentage of patients who cannot be cured by one method or the other, suggesting that some patients may be better served by one treatment, or by some form of combined-modality therapy employing radiation after surgery or neoadjuvant androgen suppression before radiation.

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The full effects of the breast-implant controversy are far-reaching, and will probably not be entirely felt for years. They certainly extend beyond the question of whether breast implants are safe, important though that question is. The narrow

The authors provide a timely review of the components of hospice/palliative care programs and an informative historical perspective on the development of these programs overseas and in the United States. They also review the current mechanisms that fund hospice care and explain how the skills for delivering hospice/palliative care have been incorporated into oncology education at Northwestern University. This articles highlights the many positive aspects of hospice programs, which currently provide expert multidisciplinary care by committed and knowledgeable professionals to almost 30% of patients with cancer in this country. However, the discussion should serve to focus attention on several additional aspects of the symptomatic care of patients with cancer.

It is ironic that the issue of aggressive local therapy for breast cancer has re-emerged as a controversial issue in the early 1990s, almost 100 years after Halsted proposed this theory in the early 1890s [1]. Since that time, both survival and quality of life seemed to have improved for patients with breast cancer, due to more sophisticated and effective treatments. Nonetheless, as Drs. Pierce and Lichter point out in their article, the precise balance between the benefits and risks of aggressive local therapy still remains to be defined.

Dr. Trimble's review of female genital tract melanomas provides a well-organized summary of the published information on these rare cancers. His inclusion of the two recent population-based samples from the United States and Sweden [1,2] is particularly useful because all of the available data on genital tract melanomas comes from long-term retrospective case reviews. The cited incidence rates calculated in the studies represent the first legitimate estimates of the incidence of these uncommon cancers.

This article provides a nice overview of HIV-associated wasting. The paper makes a number of strong points. In particular, it focuses on anorexia and decreased oral intake as key to wasting. In this vein, both the discussion by Von Roenn and Knopf and Tables 1 and 2 offer a very valuable review of the multiple reasons why HIV-infected patients may eat less. Given the many medications that we often need to use in these patients, the text discussion about the ways in which medications can result in decreased oral intake, reinforced by Table 2, is particularly useful.

Von Roenn and Knopf provide a balanced review of the pathophysiology and treatment options for anorexia and cachexia associated with HIV and cancer. This is an important topic that cuts across subspecialty lines and typically frustrates clinicians. Fortunately, more has probably been learned about HIV-associated cachexia during the past decade than about cancer-associated cachexia during the previous three decades and a number of treatment options have emerged. The reader may therefore benefit from a summary of the practical implications of recent research on HIV-associated wasting. Several clinical guidelines can be recommended:

would like to make several comments about the excellent review by Parsons et al, "Response of the Normal Eye to High-Dose Radiotherapy," which appeared in the June issue of ONCOLOGY (pp 837-852). In 1897, Chalupecky first described

The study of oncology and the management of patients with cancer are becoming increasingly complex. The amount of information necessary for clinicians to assimilate is staggering. This is particularly true for surgical oncologists, who must not only keep up with the most recent advances in cancer diagnosis and therapy but also with the most up-to-date surgical procedures. Cancer Surgery is a reference that provides this important material in a comprehensive and logically organized format.