Michael E. Karellas, MD

Chief of the Division of Urology at Stamford Hospital

sh logowhiteMember of the Stamford Health Medical Group

Stamford Health Medical Group

29 Hospital Plaza
Suite 604
Stamford, CT 06902

Main: (203) 276-8545
Fax: (203) 276-8572

About Me

Prior to joining Stamford Health Medical Group, Dr. Karellas was a member of the faculty at the Rutgers Cancer Institute of New Jersey, serving as Director of the Bladder Cancer Program, and Co-director of the Testicular Cancer Program. He has far-reaching experience in the multidisciplinary management of all stages of bladder, testicular, kidney and prostate cancers, performing open, laparoscopic and robotic procedures if surgery is indicated.

Dr. Karellas also specializes in the treatment of urinary calculi, prostate diseases, men’s health and general urologic conditions.

He has authored numerous peer-reviewed articles, book chapters, and has been the recipient of awards for his research and teaching.

Honors and Awards
  • Faculty Teaching Award, Urology Residency Program at Rutgers Robert Wood Johnson Medical School 2013
  • Ruth L. Kirschstein National Research Service Award T32 Grant, July 2006 to July 2008
  • “Student Voice Award” Outstanding Resident Educator Department of Surgery, University of Kansas School of Medicine, 2006
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Education & Training


Memorial Sloan Kettering Cancer Center


University of Kansas Medical School


University of Kansas Medical School

Medical School

University of Kansas School of Medicine

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Published Work

Peer Reviewed Journal Articles:

Sfakianos JP, Hakimi AA, Kim PH, Zabor EC, Mano R, Bernstein M, Karellas ME, Russo P, “Outcomes in patients undergoing nephrectomy for renal cancer on chronic anticoagulation therapy” Eur J Surg Oncol. 2014 Dec;40(12):1700-5. Epub 2014 Apr 24.

Ha YS, Salmasi A, Karellas M, Singer EA, Kim JH, Han M, Partin AW, Kim WJ, Lee DH, Kim IY, “Increased incidence of pathologically non-organ confined prostate cancer in African-American men eligible for active surveillance.” Urology. 2013 Apr;81(4):831-6. Epub 2013 Mar 7.

Karellas, ME, “Renal Calculi” in Conn’s Current Therapy, 2013 Edition, Ed. Bope, et al., Philadelphia: Saunders.

Teloken PE, Nelson CJ, Karellas M, Stasi J, Eastham J, Scardino PT, Mulhall JP, “Defining the impact of vascular risk factors on erectile function recovery after radical prostatectomy.” BJU Int. 2012, July 3 (Epub ahead of print)

Karellas ME, Jang TL, DiPaola R, Kim IY, “Early Detection of Prostate Cancer: A Review of the Current Data and Recommendations Regarding Prostate Cancer Screening.” Perspectives, 2011, 10:(1):12-15

Karellas ME, O’Brien MF, Jang TL, Bernstein M, Russo P., “Partial nephrectomy for selected renal cortical tumours of >/=7 cm.” BJU Int. 2010 Nov;106(10):1484-7

Karellas ME. Editorial Comment on original article “Robotic assisted laparoscopic salvage prostatectomy for radiation resistant prostate cancer.” J Urol. 2010 Jan;183(1):137

O’Brien MF, Jang TL, Cronin A, Brodman CV, Lowrence WT, Bernstein M, Karellas ME, Russo P. “Long term survival rates after resection of locally advanced kidney cancer.” (Abstract) Journal of Urology, 183(4):e639, 2010

Karellas ME, Jang TL, Kagiwada MA, Kinnaman MD, Jarnigan WR, Russo P., “Advanced Stage Renal Cell Carcinoma Treated by Radical Nephrectomy and Adjacent Organ or Structure Resection.” BJU Int. 2008, Sep: 103(2):160-164

Russo P, Jang TL, Pettus JA, Huang WC, Eggener SE, O’Brien MF, Karellas ME, Kagiwada MA, “Survival rates after resection for localized kidney cancer: 1989 – 2004.” Cancer 2008, Jul 1;113(1):84-96.

Karanikolas, NT, Jang, TL, Eggener SE, Karellas ME, Tikoo SK and Russo P. “Clinical, pathologic and survival characteristics of late relapse renal cell carcinoma. (Abstract), Journal of Urology, 177(4):428, 2007

Karanikolas NT, Karellas ME, Jang TL, Pettus JA, Stember D, Bach A, Hill, J, Tikoo SK, and Russo P. “Active surveillance for small renal masses: what is the best imaging study?” (Abstract), Journal of Urology, 177(4):592, 2007

Pietrow PK, Karellas ME., “Medical Management of Common Urinary Calculi.” American Family Physician, 2006 Jul 1; 74(1):86-94

Evangelidis A, Lee EK, Karellas ME, Thrasher JB, Holzbeierlein JM., “Evaluation of Ureterointestinal Anastomosis: Wallace vs Bricker., J Urol. 2006 May;175(5):1755-8.

Karellas ME, Gatti JM, Murphy JP, “Acute Renal Failure in a Monozygotic Twin Presenting with Cloacal Exstrophy.” J Urol. 2005 Jan;173(1):230-1


Karellas, ME, “Renal Calculi” in Conn’s Current Therapy, 2014 Edition, Ed. Bope, et al., Philadelphia: Saunders.

Karellas ME and Holzbeierlein JM, “Management of Non-Germ Cell Testis Tumors.” in Comprehensive Textbook of Genitourinary Oncology, 4th Edition. Ed. Vogelzang, et al. Philadelphia:Wolters Kluwer Health/Lippincott Williams & Wilkins, 2011. 629-634.

Board Certifications

American Board of Urology

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The majority of the physicians on the Stamford Hospital Medical Staff are not employees or agents of the Hospital. They are independent practitioners who have been granted the privilege of using the Hospital's facilities for the care and treatment of their patients. This includes, but is not limited to, emergency department physicians, anesthesiologists, radiologists, surgeons, cardiologists, obstetricians, pathologists and other consultants who may treat patients.

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Blogs I've Written

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