Keck School Faculty

Andreas M. Kaiser, MD
Andreas M. Kaiser, MD
Professor of Clinical Surgery
1441 Eastlake Ave. Health Sciences Campus Los Angeles
Andreas M. Kaiser, MD FACS FASCRS, a Professor of Clinical Surgery, graduated in 1988 from the University of Zurich in Switzerland. After an internship in Surgical Pathology, Dr. Kaiser trained in General Surgery at the University Hospital of Zurich (1990-1998), interrupted by a two year research fellowship at Harvard Medical School. He completed a fellowship in Visceral Surgery at the University Hospital in Zurich, and in Colorectal Surgery at the Keck School of Medicine at USC. In 2001, Dr. Kaiser joined the USC faculty, and from 2008- 2009, he served as Interim Chairman of the Department of Colorectal Surgery. He is a Fellow of the American College of Surgeons (FACS) and the American Society of Colon and Rectal Surgeons (FASCRS), and a member of several national and international professional associations and committees.

Dr. Kaiser has a special interest in colorectal diseases and provides a comprehensive and interdisciplinary treatment in the management of colorectal and anal cancer (primary, recurrent cancers, palliative setting), inflammatory bowel disease, acute diverticulitis, functional disorders of the colon and rectum, and benign disorders of the anus. He was a national expert/preceptor for the stapled hemorrhoidectomy (PPH); he is one of few experts nationwide performing continent ileostomies and was instrumental in the development of the T-pouch. He is an expert for evaluation and treatment of fecal incontinence and also one of few surgeons performing the Artificial Bowel Sphincter; most recently, he added the transanal endoscopic microsurgery for rectal polyps and early rectal cancer (TEMS) and Sacral Nerve Stimulation (Interstim) for fecal incontinence to the services offered at USC.

Dr. Kaiser's major areas of research interest include Colorectal Cancer, Inflammatory Bowel Disease, Diverticulitis, and Fecal Incontinence.

Dr. Kaiser is not only committed to patient-care, but also to research and education. He has written numerous articles, book chapters, including his own book "McGraw-Hill Manual of Colorectal Surgery". He is Editor-in-Chief of "Clinical and Experimental Gastroenterology", and Associate Editor of "Diseases of the Colon and Rectum", the official journal of the American Society of Colon and Rectal Surgeons; in addition, he serves on the editorial boards of the "World Journal of Gastroenterology", "World Journal of Gastrointestinal Pathophysiology", "The Open Colorectal Cancer Journal", and "The Open Surgical Oncology Journal". He is/was a member of several national committees (membership committee (chair), standards committee, program committee, CME committee). He served as Guest Editor on Hereditary Colorectal Cancer for "Seminars in Colon and Rectal Surgery", and was the lead author on a ASCRS Task Force for “New Technologies for Fecal Incontinence.”

Robotic-assisted laparoscopic repair of rectovesical fistula after Hartmann's reversal procedure J Robot Surg. 2019 Apr; 13(2):339-343. . View in PubMed

Risk Factors Associated with Reconstructive Complications Following Sacrectomy Plast Reconstr Surg Glob Open. 2018 Nov; 6(11):e2002. . View in PubMed

Abdominoperineal Resection for Rectal Cancer in the Twenty-First Century: Indications, Techniques, and Outcomes J Gastrointest Surg. 2018 08; 22(8):1477-1487. . View in PubMed

Robotic versus laparoscopic versus open colorectal surgery: towards defining criteria to the right choice Surg Endosc. 2018 Jan; 32(1):24-38. . View in PubMed

Fecal incontinence - Challenges and solutions World J Gastroenterol. 2017 Jan 07; 23(1):11-24. . View in PubMed

Surgical Considerations in the Treatment of Small Bowel Crohn's Disease J Gastrointest Surg. 2017 02; 21(2):398-411. . View in PubMed

The Author Replies Dis Colon Rectum. 2016 Oct; 59(10):e437-8. . View in PubMed

Definitive seton management for transsphincteric fistula-in-ano: harm or charm? Colorectal Dis. 2016 May; 18(5):488-95.. View in PubMed

Prevalence and risk factors for carriage of ESBL-producing Enterobacteriaceae in Amsterdam J Antimicrob Chemother. 2016 Apr; 71(4):1076-82. . View in PubMed

Medically Treated Diverticular Abscess Associated With High Risk of Recurrence and Disease Complications Dis Colon Rectum. 2016 Mar; 59(3):208-15. . View in PubMed

Fecal Incontinence: Etiology, Diagnosis, and Management J Gastrointest Surg. 2015 Oct; 19(10):1910-21. . View in PubMed

Erratum to: Clostridium Difficile Infection from a Surgical Perspective J Gastrointest Surg. 2015 Aug; 19(8):1563. . View in PubMed

The American Society of Colon and Rectal Surgeons' Clinical Practice Guideline for the Treatment of Fecal Incontinence Dis Colon Rectum. 2015 Jul; 58(7):623-36. . View in PubMed

Clostridium Difficile Infection from a Surgical Perspective J Gastrointest Surg. 2015 Jul; 19(7):1363-77. . View in PubMed

Surgical management of ulcerative colitis in the era of biologicals Inflamm Bowel Dis. 2015 Jan; 21(1):208-20. . View in PubMed

Elective resection versus observation after nonoperative management of complicated diverticulitis with abscess: a systematic review and meta-analysis Dis Colon Rectum. 2014 Dec; 57(12):1430-40. . View in PubMed

Evolution and future of laparoscopic colorectal surgery World J Gastroenterol. 2014 Nov 07; 20(41):15119-24. . View in PubMed

Current status: new technologies for the treatment of patients with fecal incontinence Surg Endosc. 2014 Aug; 28(8):2277-301. . View in PubMed

Sphincter-sparing surgery in patients with low-lying rectal cancer: techniques, oncologic outcomes, and functional results J Gastrointest Surg. 2014 Jul; 18(7):1358-72. . View in PubMed

Rectal prolapse: an overview of clinical features, diagnosis, and patient-specific management strategies J Gastrointest Surg. 2014 May; 18(5):1059-69. . View in PubMed

Practice parameters for the treatment of sigmoid diverticulitis Dis Colon Rectum. 2014 Mar; 57(3):284-94. . View in PubMed

Multi-scenario based robust intensity-modulated proton therapy (IMPT) plans can account for set-up errors more effectively in terms of normal tissue sparing than planning target volume (PTV) based intensity-modulated photon plans in the head and neck region Radiat Oncol. 2013 Jun 18; 8:145. . View in PubMed

Re-irradiation of recurrent head and neck carcinomas: comparison of robust intensity modulated proton therapy treatment plans with helical tomotherapy Radiat Oncol. 2013 Apr 20; 8:93. . View in PubMed

Elective versus emergency surgery for ulcerative colitis: a National Surgical Quality Improvement Program analysis Am J Surg. 2013 Mar; 205(3):333-7; discussion 337-8. . View in PubMed

Preoperative versus postoperative radiotherapy for rectal cancer in a decision analysis and outcome prediction model Ann Surg Oncol. 2012 Dec; 19(13):4150-60. . View in PubMed

Diversion with neoadjuvant vs surgery with adjuvant treatment for obstructing rectal cancer? Dis Colon Rectum. 2012 Oct; 55(10):e346.. View in PubMed

Laparoscopic versus open colon resections in California: a cross-sectional analysis Am Surg. 2012 Oct; 78(10):1063-5. . View in PubMed

Practice parameters for the management of colon cancer Dis Colon Rectum. 2012 Aug; 55(8):831-43. . View in PubMed

Current controversies in the management of colon cancer Curr Probl Surg. 2012 Jul; 49(7):398-460. . View in PubMed

Potentials of robust intensity modulated scanning proton plans for locally advanced lung cancer in comparison to intensity modulated photon plans Radiother Oncol. 2012 Jul; 104(1):45-51. . View in PubMed

Efficacy of management algorithm for reducing need for sphincterotomy in chronic anal fissures Colorectal Dis. 2012 Jun; 14(6):760-4. . View in PubMed

T-pouch: results of the first 10 years with a nonintussuscepting continent ileostomy Dis Colon Rectum. 2012 Feb; 55(2):155-62. . View in PubMed

Prevalence of methicillin-resistant Staphylococcus aureus and risk factors for carriage in Dutch hospitals Infect Control Hosp Epidemiol. 2010 Nov; 31(11):1188-90. . View in PubMed

Ogilvie transition to colonic perforation Am J Surg. 2010 Jul; 200(1):e15-6. . View in PubMed

Giant colonic lipoma Surgery. 2010 May; 147(5):750. . View in PubMed

Endorectal advancement flap for cryptoglandular or Crohn's fistula-in-ano Dis Colon Rectum. 2010 Apr; 53(4):486-95. . View in PubMed

Cdifficile colitis--predictors of fatal outcome. J Gastrointest Surg. 2010 Feb; 14(2):315-22. . View in PubMed

Modified Hanley procedure for management of complex horseshoe fistulae Tech Coloproctol. 2009 Dec; 13(4):301-6. . View in PubMed

Diverticulitis in California from 1995 to 2006: increased rates of treatment for younger patients Am Surg. 2009 Oct; 75(10):981-5. . View in PubMed

Inflammatory bowel disease in the United States from 1998 to 2005: has infliximab affected surgical rates? Am Surg. 2009 Oct; 75(10):976-80.. View in PubMed

The influence of peritoneal endometriotic lesions on the generation of endometriosis-related pain and pain reduction after surgical excision Arch Gynecol Obstet. 2009 Sep; 280(3):369-73. . View in PubMed

Adenocarcinoma arising in the middle of ileoanal pouches: report of five cases Dis Colon Rectum. 2009 Mar; 52(3):538-41. . View in PubMed

Diverticulitis in the United States: 1998-2005: changing patterns of disease and treatment Ann Surg. 2009 Feb; 249(2):210-7. . View in PubMed

Cloaca-like deformity with faecal incontinence after severe obstetric injury--technique and functional outcome of ano-vaginal and perineal reconstruction with X-flaps and sphincteroplasty Colorectal Dis. 2008 Oct; 10(8):827-32. . View in PubMed

Surgical excision of extensive anal condylomata not associated with risk of anal stenosis Int J Colorectal Dis. 2008 Sep; 23(9):853-6. . View in PubMed

Management of acquired rectourinary fistulas: how often and when is permanent fecal or urinary diversion necessary? Dis Colon Rectum. 2008 Jul; 51(7):1049-54.. View in PubMed

Prolonged postoperative ileus-definition, risk factors, and predictors after surgery World J Surg. 2008 Jul; 32(7):1495-500. . View in PubMed

Morbidity of ostomy takedown J Gastrointest Surg. 2008 Mar; 12(3):437-41. . View in PubMed

McGraw-Hill Manual: Colorectal Surgery 2008; 760. . View in PubMed

Questions about efficacy of continuous wound catheters J Am Coll Surg. 2007 Oct; 205(4):e2-3; author reply e3. . View in PubMed

Multimedia articleAnovaginal reconstruction with bilateral x-flaps and sphincteroplasty for cloaca-like deformity after obstetrical injury. Dis Colon Rectum. 2007 Oct; 50(10):1707. . View in PubMed

Colorectal cancer in HIV-infected patients: a case control study Int J Colorectal Dis. 2007 Oct; 22(10):1217-21. . View in PubMed

Delayed rectovaginal fistula: a potential complication of bevacizumab (avastin) Dis Colon Rectum. 2007 Jun; 50(6):930. . View in PubMed

Primary solitary extragastrointestinal stromal tumor of the greater omentum coexisting with ulcerative colitis Dig Dis Sci. 2006 Oct; 51(10):1850-2. . View in PubMed

The prognostic impact of the time interval to recurrence for the mortality in recurrent colorectal cancer Colorectal Dis. 2006 Oct; 8(8):696-703. . View in PubMed

Fistula-in-ano: do antibiotics make a difference? Int J Colorectal Dis. 2006 Jul; 21(5):441-3.. View in PubMed

Complicated diverticulitis: it is not yet time to rethink the rules! Ann Surg 2006 May; 243(5):707-8; author reply 708-9. . View in PubMed

Abdominal pain and distension Gut. 2006 Apr; 55(4):462491. . View in PubMed

Intraoperative physical diagnosis in the management of anal fistula Am Surg. 2006 Jan; 72(1):11-5. . View in PubMed

Molecular predictors of lymph node metastasis in colon cancer: increased risk with decreased thymidylate synthase expression J Gastrointest Surg. 2005 Dec; 9(9):1216-21; discussion 1221. . View in PubMed

Cost-saving effect of treatment algorithm for chronic anal fissure: a prospective analysis J Gastrointest Surg. 2005 Dec; 9(9):1237-43; discussion 1243-4. . View in PubMed

Hyperinsulinemic hypoglycemia with nesidioblastosis after gastric-bypass surgery N Engl J Med. 2005 Nov 17; 353(20):2192-4; author reply 2192-4. . View in PubMed

Preservation of bowel and urinary continence in the management of locally recurrent rectal cancer J Surg Oncol. 2005 Oct 01; 92(1):76-81. . View in PubMed

Stapled hemorrhoidectomy Am J Surg. 2005 Jul; 190(1):127-30. . View in PubMed

An unusual cause of rectal bleeding Br J Radiol. 2005 Apr; 78(928):373-5. . View in PubMed

The management of complicated diverticulitis and the role of computed tomography Am J Gastroenterol. 2005 Apr; 100(4):910-7. . View in PubMed

Re: Surgical volume and long-term survival following surgery for colorectal cancer in the Veterans Affairs Health-Care System Am J Gastroenterol. 2005 Jan; 100(1):250. . View in PubMed

Diverticulitis in young patients: why we still should not pretend to know Dis Colon Rectum. 2005 Jan; 48(1):172. . View in PubMed

Laparoscopic-assisted vsopen colectomy for colon cancer: a prospective randomized trial. J Laparoendosc Adv Surg Tech A. 2004 Dec; 14(6):329-34. . View in PubMed

Symptomatic fecal incontinence, sonographic sphincter damage, and normal manometry Dis Colon Rectum. 2004 Nov; 47(11):1991-2; author reply 1992. . View in PubMed

Management of retained colorectal foreign bodies: predictors of operative intervention Dis Colon Rectum. 2004 Oct; 47(10):1694-8. . View in PubMed

Effect of high-dose steroids on anastomotic complications after proctocolectomy with ileal pouch-anal anastomosis J Gastrointest Surg. 2004 Jul-Aug; 8(5):547-51. . View in PubMed

Internet use by colorectal surgery patients: a surgeon's tool for education and marketing Am Surg. 2004 Jun; 70(6):553-8. . View in PubMed

Preoperative probability model for predicting overall survival after resection of pulmonary metastases from colorectal cancer (Br J Surg 2004; 91: 112-120) Br J Surg. 2004 May; 91(5):645; author reply 645. . View in PubMed

Sequential compression devices as prophylaxis for venous thromboembolism in high-risk colorectal surgery patients: reconsidering American Society of Colorectal Surgeons parameters Am Surg. 2003 Nov; 69(11):941-5. . View in PubMed

Management options for symptomatic hemorrhoids Curr Gastroenterol Rep. 2003 Oct; 5(5):431-7. . View in PubMed

Images in clinical medicineChronic ulcerative colitis with megacolon. N Engl J Med. 2003 Jul 24; 349(4):358. . View in PubMed

Anorectal anatomy Surg Clin North Am. 2002 Dec; 82(6):1125-38v. . View in PubMed

State of the art in gastrointestinal surgery 100 years ago: Operations in the gastrointestinal tract in general (chapter XII) and Resection of bowel carcinoma (chapter XIV) from the Textbook of Special Surgery (1897) by Eduard Albert (1841-1900) World J Surg. 2002 Dec; 26(12):1525-30. . View in PubMed

Modified perianal incisions in graciloplasty for fecal incontinence Dis Colon Rectum. 2002 May; 45(5):703-4. . View in PubMed

André Toupet: surgeon technician par excellence Ann Surg. 2002 Apr; 235(4):591-9. . View in PubMed

Laparoscopic management of the perforated viscus Semin Laparosc Surg. 2002 Mar; 9(1):46-53. . View in PubMed

T-pouch: a new valve design for a continent ileostomy Dis Colon Rectum. 2002 Mar; 45(3):411-5. . View in PubMed

Laparoscopic splenectomy J Laparoendosc Adv Surg Tech A. 2001 Dec; 11(6):383-90. . View in PubMed

History of laparoscopy Surg Oncol Clin N Am. 2001 Jul; 10(3):483-92. . View in PubMed

Surgical management of ulcerative colitis Swiss Med Wkly. 2001 Jun 16; 131(23-24):323-37. . View in PubMed

Prognostic importance of isolated peritumoral lymphangiosis carcinomatosa in lymph-node-negative colorectal carcinoma Langenbecks Arch Surg. 2001 Mar; 386(2):124-31. . View in PubMed

Design, expression, and renaturation of a lesion-targeted recombinant epidermal growth factor-von Willebrand factor fusion protein: efficacy in an animal model of experimental colitis Int J Mol Med. 2000 Dec; 6(6):635-43. . View in PubMed

A comparison of botulinum toxin and nitroglycerin ointment for chronic anal fissure N Engl J Med. 1999 Nov 25; 341(22):1701. . View in PubMed

Cloning and expression of a cDNA encoding homospermidine synthase from Senecio vulgaris (Asteraceae) in Escherichia coli Plant J. 1999 Jul; 19(2):195-201. . View in PubMed

Commissioning of a micro-multileaf collimator for conformal stereotactic radiosurgery and radiotherapy Front Radiat Ther Oncol. 1999; 33:64-77. . View in PubMed

Acute pancreatitis and contrast medium Am J Gastroenterol. 1997 Mar; 92(3):539-40. . View in PubMed

[The value of defecography for diagnosis of rectocele and rectal prolapse] Helv Chir Acta. 1994 Jul; 60(5):697-700. . View in PubMed

Spontaneous abrupt changes in the distribution of ventilation: a cause for apparent mismatching on ventilation/perfusion scintigraphy Br J Radiol. 1989 Jun; 62(738):536-43. . View in PubMed

Post-parathyroidectomy restoration of normal calcium homeostasis in neonatal primary hyperparathyroidism Acta Endocrinol (Copenh). 1984 Mar; 105(3):350-3. . View in PubMed

Measurement of metabolism in multiple organ failure Surgery. 1982 Oct; 92(4):771-9. . View in PubMed

Locomotor biomechanics after total sacrectomy: a case report Spine (Phila Pa 1976). 2014 Nov 15; 39(24):E1481-7. . View in PubMed

Powered by SC CTSI
Go to Top