Urology
Expert guidance on urologic oncology, stone disease, BPH management, incontinence, and minimally invasive surgical approaches.
Recent Discussions
What is the role of liquid biopsy in patients with metastatic castration resistant prostate cancer to asses BRCA1/2 or other mutations and consider PARP inhibitors?
There are no FDA cleared tests that have been shown to accurately predict response or benefit from PARP inhibitors in men with prostate cancer. The risk of both false positives and false negatives remains high with these assays due and no studies in prostate cancer have shown concordance with a high...
Do you consider MSI testing for mCRPC?
I agree that data for response to immunotherapy in MMR-deficient (dMMR) prostate cancer is limited, and we estimate the rate of dMMR in prostate cancer to be low, in the 2-3% range. Nonetheless, based on responses in other dMMR tumors, pembrolizumab is now FDA approved for all dMMR/MSI-high unresect...
Is there a role for DDR gene mutation or tumor mutation burden/load in predicting response to immunotherapy in urothelial cancer?
Our recent work showed that urothelial cancers harbor high rate of alterations in DDR (DNA damage repair and response) genes, with 25 – 29% rate of deleterious alterations and up to 25% with variants of unknown significance – considering the genomic complexity of urothelial cancers, it is not un...
Do you rely on CT Hounsfield Units to determine stone composition in your patients with recurrent nephrolithiasis who have yet to submit a stone for laboratory based composition testing?
It is somewhat helpful if the value is low, consistent with Uric Acid stones, if higher, not specifically differentiate the calcium stone type. However, since it is part of routine CT stone protocol, it may add some useful information.
How do you interpret nodes with minimal increased uptake on PSMA PET in prostate cancer?
This question is relatively similar to another recent question on indeterminate PSMA PET (#26360), where I provided a longer answer in a bit more detail. The summary is that this essentially relies upon your clinical judgement, and there is no definitive algorithmic way to determine the true nature ...
Do you get DEXA scans routinely before starting ADT for prostate cancer or endocrine therapy for breast cancer?
When initiating long-term ADT, I order a DEXA scan, check vitamin D level, ensure adequate dietary calcium intake, and discuss weight-bearing exercise/refer to PT when appropriate. I also continue check DEXAs every 2 years unless they otherwise meet criteria for a bone-modifying agent (mCRPC with bo...
Is the PROTEUS data enough to change your practice in the treatment of patients with high-risk localized or locally advanced prostate cancer?
The question asks if the results of PROTEUS would/should impact practice patterns...let us take a look: ADT is not recommended to be used with radical prostatectomy in prostate cancer by any guideline. Apalutamide or any ARPI are not recommended to be used with RP in prostate cancer in any guideline...
How have flexible and navigable suction ureteral access sheaths changed how you decide between URS vs PCNL for larger stones?
The introduction of suction during ureteroscopy has significantly influenced how we utilize ureteroscopy in the management of larger stones. As our stone team is quite facile with PCNL, we would often perform percutaneous nephrolithotomy for stones 1.5 cm or larger. However, ureteroscopic suction te...
For muscle invasive bladder cancer, after neoadjuvant chemotherapy with cis/gem and surgery with residual tumor and lymph node involvement, would you consider adjuvant avelumab as an extrapolation base on the JAVELIN 100 results?
I would not use adjuvant avelumab following radical cystectomy finding residual high risk disease after neoadjuvant chemotherapy. Biologically, this group has disease resistant to neoadjuvant chemotherapy, and is not akin to those with stable or responding disease following platinum therapy included...
Would you recommend discontinuing testosterone replacement in a male patient in his 60s with newly diagnosed favorable intermediate-risk prostate cancer who is declining surgery and will receive definitive radiation?
Historically, we (as a field) have viewed TRT as the opposite of ADT and therefore inherently problematic. I am not convinced this is logical. ADT has RCT evidence to support it, whereas withdrawing TRT has not been as cleanly studied. Let's say we stop TRT, and this drops their testosterone to 150 ...