Prostate-specific antigen response to withdrawal of megestrol acetate in a patient with hormone-refractory prostate cancer

Management of Patients with Advanced Prostate Cancer: Report of the Advanced Prostate Cancer Consensus Conference 2019

BACKGROUND

Innovations in treatments, imaging, and molecular characterisation in advanced prostate cancer have improved outcomes, but there are still many aspects of management that lack high-level evidence to inform clinical practice. The Advanced Prostate Cancer Consensus Conference (APCCC) 2019 addressed some of these topics to supplement guidelines that are based on level 1 evidence.

OBJECTIVE

To present the results from the APCCC 2019.

DESIGN, SETTING, AND PARTICIPANTS

Similar to prior conferences, experts identified 10 important areas of controversy regarding the management of advanced prostate cancer: locally advanced disease, biochemical recurrence after local therapy, treating the primary tumour in the metastatic setting, metastatic hormone-sensitive/naïve prostate cancer, nonmetastatic castration-resistant prostate cancer, metastatic castration-resistant prostate cancer, bone health and bone metastases, molecular characterisation of tissue and blood, inter- and intrapatient heterogeneity, and adverse effects of hormonal therapy and their management. A panel of 72 international prostate cancer experts developed the programme and the consensus questions.

OUTCOME MEASUREMENTS AND STATISTICAL ANALYSIS

The panel voted publicly but anonymously on 123 predefined questions, which were developed by both voting and nonvoting panel members prior to the conference following a modified Delphi process.

RESULTS AND LIMITATIONS

Panellists voted based on their opinions rather than a standard literature review or formal meta-analysis. The answer options for the consensus questions had varying degrees of support by the panel, as reflected in this article and the detailed voting results reported in the Supplementary material.

CONCLUSIONS

These voting results from a panel of prostate cancer experts can help clinicians and patients navigate controversial areas of advanced prostate management for which high-level evidence is sparse. However, diagnostic and treatment decisions should always be individualised based on patient-specific factors, such as disease extent and location, prior lines of therapy, comorbidities, and treatment preferences, together with current and emerging clinical evidence and logistic and economic constraints. Clinical trial enrolment for men with advanced prostate cancer should be strongly encouraged. Importantly, APCCC 2019 once again identified important questions that merit assessment in specifically designed trials.

PATIENT SUMMARY

The Advanced Prostate Cancer Consensus Conference provides a forum to discuss and debate current diagnostic and treatment options for patients with advanced prostate cancer. The conference, which has been held three times since 2015, aims to share the knowledge of world experts in prostate cancer management with health care providers worldwide. At the end of the conference, an expert panel discusses and votes on predefined consensus questions that target the most clinically relevant areas of advanced prostate cancer treatment. The results of the voting provide a practical guide to help clinicians discuss therapeutic options with patients as part of shared and multidisciplinary decision making.

[Trazodone: a new selective approach to the treatment of hot flashes induced by androgen deprivation in prostate carcinoma?]

The growing relevance of prostate carcinoma in the developed world requires serious attention to focus on the risk-benefit relationships of the treatments used. Given the increasingly complex therapeutic approach to prostate carcinoma, an extensive range of knowledge is required. Androgen deprivation plays a central role in this disease. The management of androgen deprivation-derived toxicity in the form of hot flashes, metabolic syndrome, osteoporosis, cognitive disorders, etc., is of growing interest. The drug treatment of hot flashes involves hormone management that is not without oncological risk and moreover generates considerable toxicity. Antidepressants in turn play an important role in the non-hormone treatment of this disorder. Trazodone, a serotonin reuptake inhibitor/5-HT2A receptor antagonist affording more selective action upon the receptors implicated in hot flashes, could be of great interest. Trazodone shows great affinity for the 5-HT2A receptors and moderate affinity for the 5-HT1A receptors. Serotonin (5-hydroxytryptamine, or 5-HT) levels are known to be lowered in postmenopausal women, and normalize when replacement therapy is provided. This suggests that abrupt sexual hormone deprivation gives rise to a reduction in blood serotonin - with a subsequent increase in its hypothalamic 5-HT2A receptors. These receptors would be implicated in the physiopathology of hot flashes; as a result, the blocking of such receptors is one of the principal therapeutic measures. The use of trazodone, increasing the serotonin concentrations and blocking the 5-HT2A and 5-HT1A receptors, could be viewed as a novel management approach more in line with the physiopathology of hot flashes. Well designed comparative studies are needed to establish the efficacy of such treatment. Other issues pending clarification would be the most effective dose and duration of treatment for controlling hot flashes.

Treatment of hot flushes in breast and prostate cancer

Hot flushes, the most common health problem reported by menopausal-age women, can lead to significant morbidity and affect the social life, ability to work and sleep pattern of the sufferer. Women treated for breast cancer and men receiving androgen ablation for prostate cancer experience hot flushes that are more frequent, severe and longer lasting than those experienced by the general menopausal population. In women with breast cancer, hot flushes can result from chemotherapy-induced menopause, hormonal therapy, or ovarian suppression. In men with prostate cancer, hot flushes occur after surgical or medical castration. Hormone replacement therapy with oestrogen-based compounds has been a mainstay of treatment for hot flushes during the perimenopausal period. However, recent studies have shown that, in healthy menopausal women, hormone replacement therapy is associated with an increased risk of breast cancer, myocardial infarction, thrombo-embolic events and stroke. Thus, identifying nonhormonal agents that can control hot-flush symptoms is essential to the quality of life of a growing population of cancer survivors. The most promising agents act on the CNS and include selective serotonin reuptake inhibitors, as well as venlafaxine and gabapentin.

Andropause: Symptom Management for Prostate Cancer Patients Treated With Hormonal Ablation

Andropause, or the age-related decline in serum testosterone, has become a popular topic in the medical literature over the past several years. Andropause includes a constellation of symptoms related to lack of androgens, including diminished libido, decreased generalized feeling of well-being, osteoporosis, and a host of other symptoms. The andropause syndrome is very prominent in men undergoing hormonal ablation therapy for prostate cancer. Most significant in this population are the side effects of hot flashes, anemia, gynecomastia, depression, cognitive decline, sarcopenia, a decreased overall quality of life, sexual dysfunction, and osteoporosis with subsequent bone fractures. The concept of andropause in prostate cancer patients is poorly represented in the literature. In this article, we review the current literature on the symptoms, signs, and possible therapies available to men who cannot take replacement testosterone.

Rapid progression of advanced "hormone-resistant" prostate cancer during palliative treatment with progestins for cancer cachexia

We report three patients with advanced "hormone-resistant" prostate cancer, each of whom had rapid progression of the disease during treatment with megestrol acetate for cancer cachexia. All patients had been previously treated with total androgenic deprivation. With progression of the disease, megestrol acetate was given to palliate the cancer-related wasting syndrome. No other antineoplastic drugs were contemporaneously given, and no concomitant condition that could favor the progression of the disease was present. The worsening observed while receiving megestrol acetate, and the atypical withdrawal syndrome occurring after the treatment was stopped, seem to suggest a promoting role of megestrol acetate in advanced "hormone-resistant" prostate cancer. The risk of rapid disease progression overwhelming the anti-cachectic palliative effect should be kept in mind when progestins are administered as a palliative treatment of cancer cachexia in patients with advanced "hormone-resistant" prostate cancer.

The treatment of prostate cancer: an overview of current options

PURPOSE

The purpose of this report is to discuss the current treatment options available to the patient with prostate cancer in all stages of the disease.

OVERVIEW

With the exception of skin cancer, prostate cancer is the most common cancer in men in the United States. Most patients in the current era will present with organ-confined disease, amenable to curative treatment. Treatment for organ-confined disease includes watchful waiting, radical prostatectomy, radiation therapy, and cryosurgery in selective cases. Hormone therapy is the cornerstone of treatment of patients with advanced prostate cancer. There is no curative treatment for hormone-refractory prostate cancer.

CLINICAL IMPLICATIONS

The availability of several therapeutic options for localized prostate cancer warrants careful consideration when planning treatment with curative intent. Patients need to be active participants in decision making, and they must be aware of the benefits and possible complications of the different types of treatment. Patients with advanced prostate cancer need to be aware that hormone treatment will provide temporization and palliation in the majority of cases. Hormone-resistant prostate cancer is refractory to most forms of conventional and experimental therapy.