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Cancer can limit one’s physical activity. Can physical activity limit one’s cancer? I’ve become a convert to thinking that it is possible that it can. I’m not convinced yet, but a few years ago I decided that it was worth my time and effort to study it. Compelling patient stories stick with us. I’ll never forget the story of a patient of mine who died several years ago. Let’s call him Dan.
Cell Free DNA analysis may improve the scalability of genomics for prostate cancer.  The management of CRPC has long been plagued by the inability of clinicians to get an accurate sense of the underlying biology of the tumor that they are treating. 
The flurry of media recently in reaction to Senator John McCain’s diagnosis of glioblastoma multiforme, a highly malignant brain tumor, touched right at the heart of where cancer fits in the American psyche:  That it is a battle to be won.
I write today not from the files of the Jimmy Buffet musical collection, nor from a Caribbean Margaritaville-esque cabana, as the reference might suggest (for the unfamiliar, I have been humming his song “Changes in Latitude, Changes in Attitude…for about 2 weeks now)  but rather as a dispatch on the latest development in clinical trials in prostate cancer.  The topic:  Data from the Latitude study that was presented at ASCO by Karim Fizazi and simultaneously published in the New England Journal of Medicine.
It is becoming increasingly well known that about 25% of CRPC tumors harbor some form of a mutation in BRCA1, 2, ATM or other such genes. Colin Pritchard and others have done some really excellent work on this topic by giving us genomic snapshots of the disease (you can see me interview him in St Gallen on this topic here on UroToday: link).1 The efficacy of Parp inhibitors in this setting is being tested in a number of trials at the moment. 
I have been struck in the past few weeks by the number of patients in my practice who have advanced metastatic CRPC who were diagnosed more than 15 years ago and had, on their original biopsy specimen, ONLY a Gleason 6 pattern prostate carcinoma.
Welcome to my blog on UroToday!  I am a genitourinary medical oncologist at the University of California – San Francisco and specialize in the management of advanced prostate cancer. I maintain a specific focus on androgen and androgen receptor (AR) interactions in the tumor as well as in the patient. The science of testosterone and prostate cancer have both exploded in the last decade, and one of my goals is to help navigate these findings through both a scientific and a patient oriented perspective. 
I have spent the better part of the last 20 years thinking about testosterone and the androgen receptor (AR) and its effect on prostate cancer. I started by applying synthetic testosterone to cancer cells in the laboratory at the University of Wisconsin, progressed to studying the effect of retained androgen receptor signaling in human prostate tumors at Memorial Sloan Kettering and finally studied the clinical effects of abiraterone, apalutamide, ketoconazole and other drugs as therapies for prostate cancer here at UCSF. One of the best pieces of career advice that I ever got was a very simple: Follow the AR.
In the last two weeks I’ve had one patient refuse ADT because of his history of depression, another who has been on ADT for 10 months asked me to refer him to a psychiatrist, and another, with CRPC who has been on ADT for 4 years, told me his depression is finally under control. This leaves a lot of issues to confront.

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