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© NATALIE SCHENKER-AHMED, PHD, AND DAVID S. KAROW, MD, PHD
Prostate MRI May Have AS Benefit Better detection of significant PCa observed BY JODY A. CHARNOW MAGNETIC RESONANCE imagingultrasound fusion (MRI/fusion) targeted prostate biopsy may improve detection of clinically significant tumors in prostate cancer patients on active surveillance (AS) undergoing confirmatory biopsy, researchers reported at the Society of Urologic Oncology 17th annual meeting in San Antonio, Texas. “We observed that 70% of AS patients have MRI-detectable lesions, the majority of which are consistent with low-grade disease,” senior author J. Kellogg Parsons, MD, MHS, a urologic
IN THIS ISSUE 10
Preoperative use of 5-ARIs may reduce blood loss during TURP
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Studies validate new prostate cancer grading system
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Obesity is associated with an elevated risk for BPH
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Robotic radical nephrectomy increasingly used for RCC
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Metformin use found to decrease prostate cancer risk Serious infections raise ESRD risk in SLE patients. PAGE 25
oncologist and professor of surgery at the University of California San Diego in La Jolla, told Renal & Urology News. “MRI/fusion targeted biopsy in patients with PI-RADS 4 and 5 lesions was superior to systematic biopsy for the detection of clinically significant disease, suggesting that MRI and selective, targeted biopsy of PI-RADS 4 and 5 lesions should be considered in AS patients.” In a study of 356 AS patients, a team led by Dr. Parsons and first author Zachary Hamilton, MD, who presented study findings, compared MRI/ fusion targeted biopsy (TB) to standard
MRI SCANS SHOWING a suspicious prostate lesion (boundary outlined at upper left).
transrectal ultrasound (TRUS)-guided systematic biopsy (SB) for detecting Gleason 3 + 4 = 7 or higher disease. A total of 195 patients (58%) underwent prostate MRI after the initial diagnostic biopsy. Of these, 138 (71%) had prostate lesions detectable on MRI.
After implementation of TB in May 2014, 42 AS patients underwent confirmatory MRI/fusion TB: 9 (21.4%), 19 (45.2%), 7 (16.7%), and 7 (16.7%) with PI-RADS 2, 3, 4, and 5 lesions, respectively. MRI-guided biopsy of the continued on page 11
In-Office Biopsy Researchers Establish Normal of Renal Masses Testosterone Reference Range Safe, Efficacious BY NATASHA PERSAUD the Journal of Clinical Endocrinology & OFFICE-BASED ultrasound-guided renal mass biopsy (RMB) is a safe and efficacious procedure for managing appropriately selected patients with small renal masses, according to investigators. “It potentially offers improved dynamic characterization of solid renal mass, greater convenience to patients, as well as cost savings,” a team led by Chirag N. Dave, MD, of the Beaumont Health System in Royal Oak, Michigan, concluded in a paper published online ahead of print in Urology. Dr. Dave and his colleagues studied a retrospective cohort of 108 patients who underwent office-based continued on page 11
RESEARCHERS HAVE established a reference range for normal total testosterone levels using values harmonized by the Steroid Hormone Standardization Program at the Centers for Disease Control and Prevention (CDC) in Atlanta. For healthy, non-obese men aged 19 to 39 from Europe or the United States, the harmonized normal range of total testosterone is 264 to 916 ng/dL, a range that corresponds to the 2.5th to 97.5th percentile, investigators reported in a paper published online ahead of print
Metabolism. Values below the 2.5th percentile indicate hypogonadism. Lack of a universally accepted testosterone threshold has made accurate diagnosis of hypogonadism difficult. “Well-defined reference ranges are at the heart of clinical practice and without them clinicians can make erroneous diagnoses that could lead to patients receiving costly, lifelong treatments that they don’t need or deny treatments to those who need them,” lead researcher Shalender Bhasin, MD, continued on page 11
CALCIPHYLAXIS LINKED TO LOW VITAMIN K
The vitamin has a role in inhibiting vascular calcification PAGE 22