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Featured researches published by S. Siemer.


The Journal of Urology | 2006

Outcome of renal tumors in young adults.

S. Siemer; Markus Hack; Jan Lehmann; Frank Becker; M. Stöckle

PURPOSE Sporadic RCC is rare in young adults. We retrospectively reviewed the outcomes of patients 20 to 40 years old at our institution. MATERIALS AND METHODS Between 1975 and 2004, 2,710 patients were treated surgically for renal masses at our institution. We found 120 patients (4.4%) 20 to 40 years old. We analyzed the clinical presentation, pathological characteristics and outcome of these patients, and compared it to patients older than 40 years. RESULTS The mean age of 120 young adults was 34.1 years (range 20.4 to 39.8). Symptomatic presentation was documented in 49.5% of patients. RCC was found in 87 (72.5%) young adults. Young patients generally had a higher rate of organ confined tumors than patients older than 40 years (73.6% vs 59.3%, p <0.05). Histopathological characteristics, tumor size, lymph node metastases and distant metastatic disease did not differ significantly in young and older patients. Women were significantly more likely to have benign lesions (41% vs 20%, p <0.05). Mean followup for 120 patients was 80.6 months and 15 of 87 patients with RCC (17.2%) died of tumor related causes (mean followup 27.5 months). The 10-year cancer specific survival rate was 78% in young adults and 68% in older patients (p = 0.22). Multivariate Cox regression analysis revealed lymph node metastases and tumor differentiation grade as independent prognostic parameters in young patients. CONCLUSIONS Young patients are more likely to have symptomatic tumors at presentation. Nevertheless, they have more favorable pathological features and a definite trend to superior disease specific survival following surgical treatment. Organ sparing surgery should be considered in young women since benign lesions are frequent found in this population.


The Journal of Urology | 2009

Quality of Life and Self-Esteem for Children With Urinary Urge Incontinence and Voiding Postponement

N. Natale; S. Kuhn; S. Siemer; M. Stöckle; A. von Gontard

PURPOSE Urge incontinence and voiding postponement are common subtypes of daytime wetting in children. We analyzed health related quality of life for children with urge incontinence and voiding postponement, and healthy controls at 2 centers. MATERIALS AND METHODS We examined a total of 49 consecutive children 5 to 13 years old who presented with urge incontinence (22) or voiding postponement (27), and 32 controls matched for age and sex. Health related and overall quality of life were measured with generic questionnaires, and self-esteem was measured with the Piers-Harris questionnaire. RESULTS Health related quality of life was significantly reduced in parent rating but not in child rating in the incontinent vs control group (total mean parent score 73 vs 78, child 76 vs 76). Children with voiding postponement have the lowest health related quality of life. Overall quality of life was significantly reduced in children with incontinence, while self-esteem did not differ. Children with externalizing disorders generally have the lowest health related and overall quality of life. CONCLUSIONS Health related and overall quality of life are useful constructs, and are reduced in children with daytime incontinence by parental rating. In comparison, children rate their quality of life as being higher. Quality of life is lowest with externalizing behavioral disorders, as in children with voiding postponement. Due to comorbid behavioral disturbances, children with voiding postponement often need additional assessment, counseling and treatment.


Indian Journal of Urology | 2014

International Robotic Radical Cystectomy Consortium: A way forward.

Syed Johar Raza; Adam S. Kibel; A. Mottrie; Alon Z. Weizer; Andrew J. Wagner; Ashok K. Hemal; Douglas S. Scherr; Francis Schanne; Franco Gaboardi; Guan Wu; James O. Peabody; Jihad Koauk; Juan Palou Redorta; John Pattaras; Koon Ho Rha; Lee Richstone; Balbay; Mani Menon; Mathew Hayn; Micheal Stoeckle; Peter Wiklund; Prokar Dasgupta; Raj S. Pruthi; Reza Ghavamian; Shahid A. Khan; S. Siemer; Thomas J. Maatman; Timothy Wilson; Poulakis; G. Wilding

Robot-assisted radical cystectomy (RARC) is an emerging operative alternative to open surgery for the management of invasive bladder cancer. Studies from single institutions provide limited data due to the small number of patients. In order to better understand the related outcomes, a world-wide consortium was established in 2006 of patients undergoing RARC, called the International Robotic Cystectomy Consortium (IRCC). Thus far, the IRCC has reported its findings on various areas of operative interest and continues to expand its capacity to include other operative modalities and transform it into the International Radical Cystectomy Consortium. This article summarizes the findings of the IRCC and highlights the future direction of the consortium.


Indian Journal of Urology | 2014

International radical cystectomy consortium: A way forward

Syed Johar Raza; Erinn Field; Adam S. Kibel; Alex Mottrie; Alon Z. Weizer; Andrew J. Wagner; Ashok K. Hemal; Douglas S. Scherr; Francis Schanne; Franco Gaboardi; Guan Wu; James O. Peabody; Jihad Koauk; Joan Palou Redorta; John Pattaras; Koon Ho Rha; Lee Richstone; M. Derya Balbay; Mani Menon; Mathew Hayn; Micheal Stoeckle; Peter Wiklund; Prokar Dasgupta; Raj S. Pruthi; Reza Ghavamian; Shamim Khan; S. Siemer; Thomas J. Maatman; Timothy Wilson; Vassilis Poulakis

Robot-assisted radical cystectomy (RARC) is an emerging operative alternative to open surgery for the management of invasive bladder cancer. Studies from single institutions provide limited data due to the small number of patients. In order to better understand the related outcomes, a world-wide consortium was established in 2006 of patients undergoing RARC, called the International Robotic Cystectomy Consortium (IRCC). Thus far, the IRCC has reported its findings on various areas of operative interest and continues to expand its capacity to include other operative modalities and transform it into the International Radical Cystectomy Consortium. This article summarizes the findings of the IRCC and highlights the future direction of the consortium.


The Journal of Urology | 2014

MP60-06 ONCOLOGICAL SAFETY AFTER ROBOT-ASSISTED RADICAL CYSTECTOMY: RESULTS FROM THE INTERNATIONAL ROBOTIC CYSTECTOMY CONSORTIUM

Matthias Saar; Syed Johar Raza; John Binkowski; Lee Richstone; Andrew J. Wagner; Timothy Wilson; Joan Palou Redorta; Prokar Dasgupta; James O. Peabody; Peter Wiklund; Franco Gaboardi; Alex Mottrie; S. Siemer; Raj S. Pruthi; Alon Z. Weizer; Francis Schanne; Khurshid A. Guru; Koon-Ho Rha; Ashok K. Hemal; Douglas S. Scherr; M. Stöckle

Matthias Saar*, Homburg Saar, Germany; Syed Johar Raza, John Binkowski, Buffalo, NY; Lee Richstone, New York, NY; Andrew Wagner, Boston, MA; Timothy Wilson, Duarte, CA; Joan Palou Redorta, Barcelona, Spain; Prokar Dasgupta, London, United Kingdom; James Peabody, Detroit, MI; Peter Wiklund, Stockholm, Sweden; Franco Gaboardi, Milan, Italy; Alex Mottrie, Aalast, Belgium; Stephan Siemer, Homburg Saar, Germany; Raj Pruthi, Chapel Hill, NC; Alon Weizer, Ann Arbor, MI; Francis Schanne, Newark, DE; Khurshid Guru, East Amherst, NY; Koon-ho Rha, Seoul, Korea, Republic of; Ashok Hemal, Winston-Salem, NC; Douglas Scherr, New York, NY; Michael Stockle, Homburg Saar, Germany


Indian Journal of Urology | 2014

International Robotic Radical Cystectomy Consortium

Syed Johar Raza; Erinn Field; Adam S. Kibel; Alex Mottrie; Alon Z. Weizer; Andrew J. Wagner; Ashok K. Hemal; Douglas S. Scherr; Francis Schanne; Franco Gaboardi; Guan Wu; James O. Peabody; Jihad Koauk; Joan Palou Redorta; John Pattaras; Koon-Ho Rha; Lee Richstone; M. Derya Balbay; Mani Menon; Mathew Hayn; Micheal Stoeckle; Peter Wiklund; Prokar Dasgupta; Raj S. Pruthi; Reza Ghavamian; Shamim Khan; S. Siemer; Thomas J. Maatman; Timothy Wilson; Vassilis Poulakis

Robot-assisted radical cystectomy (RARC) is an emerging operative alternative to open surgery for the management of invasive bladder cancer. Studies from single institutions provide limited data due to the small number of patients. In order to better understand the related outcomes, a world-wide consortium was established in 2006 of patients undergoing RARC, called the International Robotic Cystectomy Consortium (IRCC). Thus far, the IRCC has reported its findings on various areas of operative interest and continues to expand its capacity to include other operative modalities and transform it into the International Radical Cystectomy Consortium. This article summarizes the findings of the IRCC and highlights the future direction of the consortium.


European Urology Supplements | 2014

PE67: Early oncologic failure after robot-assisted radical cystectomy: Results from the international robotic cystectomy consortium

Matthias Saar; J. Syed; K. Guru; Seyedeh Dibaj; A. Khan; Adam S. Kibel; A. Mottrie; Alon Z. Weizer; Andrew J. Wagner; Ashok K. Hemal; Douglas S. Scherr; Francis Schanne; Franco Gaboardi; Guan Wu; James O. Peabody; Jihad H. Kaouk; J. Palou Redorta; Koon-Ho Rha; Lee Richstone; Mevlana Derya Balbay; Mani Menon; Mathew Hayn; Michael Woods; Peter Wiklund; Prokar Dasgupta; Raj S. Pruthi; Robert L. Grubb; Mohammad Shamim Khan; S. Siemer; Timothy Wilson


European Urology Supplements | 2014

PE68: Perioperative outcomes of neoadjuvant chemotherapy versus radical cystectomy in patients treated with robot-assisted radical cystectomy: Results from the International Robotic Cystectomy Consortium (IRCC)

Michael Woods; J. Syed; Seyedeh Dibaj; A. Khan; A. Mottrie; Alon Z. Weizer; Andrew J. Wagner; Ashok K. Hemal; Douglas S. Scherr; Francis Schanne; Franco Gaboardi; Guan Wu; James O. Peabody; Jihad H. Kaouk; J. Palou Redorta; Koon-Ho Rha; Lee Richstone; Mani Menon; M. Stöckle; Peter Wiklund; Prokar Dasgupta; Robert L. Grubb; Mohammad Shamim Khan; S. Siemer; Timothy Wilson; G. Wilding; K. Guru; Raj S. Pruthi


European Urology Supplements | 2018

Robotic salvage lymph node dissection in prostate cancer after PSMA- or Choline-PET/CT: Operative and early oncological results

J. Linxweiler; Matthias Saar; Z. Al-Kailani; M. Stöckle; S. Siemer; C.H. Ohlmann


European Urology Supplements | 2017

Robot-assisted radical cystectomy with intracorporal urinary diversion: Evolution of the technique for a modified Hautmann neobladder

C.H. Ohlmann; M. Janssen; Matthias Saar; T. Egner; G. Schön; M. Stöckle; S. Siemer

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Ashok K. Hemal

Wake Forest Baptist Medical Center

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Raj S. Pruthi

University of North Carolina at Chapel Hill

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Timothy Wilson

City of Hope National Medical Center

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