Gus Miranda

Prof. Gus Miranda

Urology, University of Southern California, Los Angeles, California, USA
orcid

Research Focus & Metrics

Academic Career Length

24Years (2003-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

View All Publications
12 May 2023 in The Lancet Oncology
Verified
Journal Article
Closed access
AZAlexandre R. Zlotta
Alexandre R. Zlotta
LBLeslie K Ballas
Leslie K Ballas
ANAndrzej Niemierko
Andrzej Niemierko
KLKatherine Lajkosz
Katherine Lajkosz
CKCynthia Kuk
Cynthia Kuk
JEJason A Efstathiou
Jason A Efstathiou

1 July 2014 in Journal of Urology
Verified
Journal Article
Closed access
SDSiamak Daneshmand
Siamak Daneshmand
HAHamed Ahmadi
Hamed Ahmadi
ASAnne K. Schuckman
Anne K. Schuckman
AMAnirban P. Mitra
Anirban P. Mitra
JCJie Cai
Jie Cai
HDHooman Djaladat
Hooman Djaladat
Enhanced recovery after surgery protocols aim to improve patient care and decrease complications and hospital stay. We evaluated our enhanced recovery after surgery protocol, focusing on length of stay, early complication and readmission rates after radical cystectomy for bladder cancer. From May 2012 to July 2013 a perioperative protocol was applied in 126 consecutive patients who underwent open radical cystectomy and urinary diversion. Nonconsenting patients (2), those with previous diversion (2) and prolonged postoperative intubation (3), and those who underwent additional surgery (9) were excluded from study. The protocol focuses on avoiding bowel preparation and nasogastric tube, early feeding, nonnarcotic pain management and the use of cholinergic and μ-opioid antagonists. Outcomes were compared to those in matched controls from our bladder cancer database. A total of 110 patients with a median age of 69 years were included in analysis, of whom 68% underwent continent urinary diversion. Of the patients 82% had a bowel movement by postoperative day 2. Median length of stay was 4 days. The 30-day minor and major complication rates were 64% and 14%, respectively. The most common minor complication was anemia requiring transfusion in 19% of patients, urinary tract infection in 13% and dehydration in 10%. The latter 2 complications were the most common etiologies for readmission. The 30-day readmission rate was 21% (23 patients). Patients 75 years old or older had a longer length of stay (5 vs 4 days, p = 0.03) and a higher minor complication rate (72% vs 51%, p = 0.04) than younger patients. Our enhanced recovery after surgery protocol expedites bowel function recovery and shortens hospital stay after RC and urinary diversion without an increase in the hospital readmission rates.

1 October 2011 in Journal of Urology
Verified
Journal Article
Closed access
PZPascal Zehnder
Pascal Zehnder
USUrs E. Studer
Urs E. Studer
ESEila C. Skinner
Eila C. Skinner
RDRyan P. Dorin
Ryan P. Dorin
JCJie Cai
Jie Cai
DSDonald G. Skinner
Donald G. Skinner
There is evidence from retrospective studies that radical cystectomy with extended pelvic lymph node dissection provides better staging and outcomes than limited lymph node dissection. However, the optimal limits of extended lymph node dissection remain unclear. We compared oncological outcomes at 2 cystectomy centers where 2 different extended lymph node dissection templates are practiced to determine whether removing lymphatic tissue up to the inferior mesenteric artery confers an additional survival advantage. Patients undergoing radical cystectomy and extended lymph node dissection with curative intent from 1985 to 2005 were included in analysis if they met certain criteria, including clinically organ confined urothelial bladder carcinoma (cN0M0), pathological stage pT2-pT3, negative surgical margins and no neoadjuvant therapy. Survival and recurrence data were analyzed. Demographic data and pathological subgroup distribution (pT2 and pT3) were similar in the 554 University of Southern California and 405 University of Bern patients. University of Southern California patients had higher median number of lymph nodes removed than University of Bern patients (38 vs 22, p <0.0001) and a higher incidence of lymph node metastasis (35% vs 28%, p = 0.02). However, the University of Southern California and University of Bern groups had similar 5-year recurrence-free survival for pT2pN0-2 (57% vs 67%) and pT3pN0-2 (32% vs 34%) disease (p = 0.55 and 0.44, respectively). The overall recurrence rate was equal at the 2 institutions (38%). Meticulous extended lymph node dissection up to the mid-upper third of the common iliac vessels appears to provide survival and recurrence outcomes similar to those of a super extended template up to the inferior mesenteric artery. Complete skeletonization in the extended lymph node dissection template is more important than nodal yield. This does not exclude the possibility that certain patient subgroups with suspicious nodes or after neoadjuvant chemotherapy may benefit from more extensive lymph node dissection.

17 June 2005 in Cancer
Verified
Journal Article
Closed access
PDF file
PCPeter E. Clark
Peter E. Clark
JSJohn P. Stein
John P. Stein
SGSusan G. Groshen
Susan G. Groshen
JCJie Cai
Jie Cai
GMGus Miranda
Gus Miranda
DSDonald G. Skinner
Donald G. Skinner

1 April 2005 in Journal of Urology
Verified
Journal Article
Closed access
PDF file
JSJohn P. Stein
John P. Stein
PCPeter Clark
Peter Clark
GMGus Miranda
Gus Miranda
JCJie Cai
Jie Cai
SGSusan Groshen
Susan Groshen
DSDonald G. Skinner
Donald G. Skinner
We evaluated the incidence and risks of urethral recurrence following radical cystectomy and urinary diversion in men with transitional cell carcinoma of the bladder. Clinical and pathological results were evaluated in 768 consecutive male patients undergoing radical cystectomy with intent to cure for bladder cancer with a median followup 13 years, including 397 (51%) who underwent orthotopic urinary diversion with a median followup of 10 years and 371 (49%) who underwent cutaneous urinary diversion with a median followup of 19 years. Demographically and clinically these 2 groups were well matched with the only exception being longer median followup in the cutaneous group (p <0.001). Urethral recurrence was analyzed by univariate and multivariable analysis according to carcinoma in situ, tumor multifocality, pathological characteristics (tumor grade, stage and subgroup), the presence and extent of prostate tumor involvement (superficial vs stromal invasion) and the form of urinary diversion (cutaneous vs orthotopic). A total of 45 patients (6%) had urethral recurrence at a median of 2 years (range 0.2 to 13.6), including 16 (4%) with an orthotopic and 29 (8%) with a cutaneous form of urinary diversion. Carcinoma in situ and tumor multifocality were not significantly associated with an increased risk of urethral recurrence (p = 0.07 and 0.06, respectively). The presence of any (superficial and/or stromal invasion) prostatic tumor involvement was identified in 129 patients (17%). Prostate tumor involvement was associated with a significantly increased risk of urethral recurrence (p = 0.01). The estimated 5-year chance of urethral recurrence was 5% without any prostate involvement, increasing to 12% and 18% with superficial and invasive prostate involvement, respectively. Patients undergoing orthotopic diversion demonstrated a significantly lower risk of urethral recurrence compared with those undergoing cutaneous urinary diversion (p = 0.02). Patients without any prostate tumor involvement and orthotopic diversion (lowest risk group) demonstrated an estimated 4% year chance of urethral recurrence compared with a 24% chance in those with invasive prostate involvement undergoing cutaneous diversion (highest risk group). On multivariate analysis any prostate involvement (superficial and/or invasive) and urinary diversion form remained independent and significant predictors of urethral recurrence (p = 0.035 and 0.01, respectively). At long-term followup urethral tumor recurrence occurs in approximately 7% of men following cystectomy for bladder transitional cell carcinoma. Involvement of the prostate with tumor and the form of urinary diversion were significant and independent risk factors for urethral tumor recurrence. Patients undergoing orthotopic diversion have a lower incidence of urethral recurrence compared with those undergoing cutaneous diversion. Although prostate tumor involvement is a risk factor for urethral recurrence, it should not preclude orthotopic diversion, provided that intraoperative frozen section analysis of the urethral margin is without evidence of tumor.

1 March 2006 in Journal of Urology
Verified
Journal Article
Closed access
MQMarcus L. Quek
Marcus L. Quek
JSJohn P. Stein
John P. Stein
SDSiamak Daneshmand
Siamak Daneshmand
GMGus Miranda
Gus Miranda
DTDuraiyah Thangathurai
Duraiyah Thangathurai
DSDonald G. Skinner
Donald G. Skinner
Operative mortality from radical cystectomy has decreased as a result of improvements in surgical and anesthetic care. We reviewed the perioperative deaths from a large group of patients treated with radical cystectomy for primary bladder cancer. All perioperative mortalities from radical cystectomy were identified from a single high volume institution. The medical records were reviewed to assess the cause of death as well as possible contributing factors. From August 1971 to December 2001, 1,359 patients with primary bladder cancer were treated with radical cystectomy and pelvic iliac lymphadenectomy at our institution. Of these patients, 27 (2%) died within 30 days of surgery or before discharge from hospital. Median patient age at surgery was 67 years (range 47 to 78) and males accounted for 81% of the patients. The median time to death was 28 days from cystectomy (range 0 to 80). Most deaths were cardiovascular related (including acute myocardial infarction, cerebrovascular accident, arterial thrombosis) or due to septic complications with resulting multi-organ system failure, followed by pulmonary embolism, hepatic failure and hemorrhage. Septic related mortality was most often associated with postoperative urine or bowel leak. While most deaths occurred before hospital discharge, 2 patients died at home due to a late pulmonary embolus. No association was seen between pathological stage or type of urinary diversion and mortality. Perioperative mortality from radical cystectomy is low in this group of patients. Most deaths are due to cardiovascular or septic complications. Careful patient selection and meticulous surgical technique may help decrease the incidence of perioperative mortality.