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Surgeon, Colon & Rectal Surgeon
17 years of experience
Accepting new patients
Video profile


Education ?

Medical School Score Rankings
Temple University Physicians (1995)
Top 50%
University of Connecticut Hospital (2000) *
UMDNJ Robert Wood Johnson (2001) *
Colon & Rectal Surgery
* This information was reported to Vitals by the doctor or doctor's office.

Awards & Distinctions ?

Top Docs 2011
Castle Connolly's Top Doctors™ (2012 - 2013)
Patients' Choice 5th Anniversary Award (2012 - 2015)
Patients' Choice Award (2008 - 2015)
Compassionate Doctor Award - 5 Year Honoree (2015)
Compassionate Doctor Recognition (2011 - 2015)
Top 10 Doctor - State (2014)
Colon & Rectal Surgeon
Top 10 Doctor - Metro Area (2014)
Delaware Valley
Colon & Rectal Surgeon
On-Time Doctor Award (2014 - 2015)
Castle Connolly *
Temple University School of Medicine
Clinical (Adjunct) Assistant Professor of Surgery
Drexel University College of Medicine
Clinical Associate Professor of Surgery
American College of Surgeons
American Board of Surgery
American Board of Colon and Rectal Surgery

Affiliations ?

Dr. Fassler is affiliated with 5 hospitals.

Hospital Affiliations



  • Holy Redeemer Health System
    1648 Huntingdon Pike, Jenkintown, PA 19046
    Top 50%
  • Warminster Hospital
    225 Newtown Rd, Warminster, PA 18974
  • Abington Memorial Hospital *
    1200 Old York Rd, Abington, PA 19001
  • Holy Redeemer Hospital And Medical Center
  • Am Soc of Colon & Rectal Surg.
  • Publications & Research

    Dr. Fassler has contributed to 6 publications.
    Title Outcomes in Patients Treated by Laparoscopic Resection of Rectal Carcinoma After Neoadjuvant Therapy for Rectal Cancer.
    Date September 2007
    Journal Jsls : Journal of the Society of Laparoendoscopic Surgeons / Society of Laparoendoscopic Surgeons

    OBJECTIVE: We analyzed the effect of neoadjuvant chemo radiation on feasibility and outcomes in rectal cancer patients undergoing laparoscopic resection of the rectum. METHODS: This was a retrospective analysis of a consecutive series of laparoscopic resections for rectal cancer from 1998 to 2004 (N=60). RESULTS: Eight patients received preoperative chemoradiation therapy (neoadjuvant group) for rectal cancer and 52 patients did not (primary surgical group). The conversion rate was higher in the neoadjuvant group, but this did not reach statistical significance (3/8, 37% in the neoadjuvant group vs. 7/52, 13% in the primary surgical group, P=0.12). Operative time was longer in the neoadjuvant group (170+/-60 vs 228+/-70 min, P=0.03). Complication rates (3/52, 5.7% in the primary surgical vs. 0% in the neoadjuvant group, P=1.0), and a median number of resected lymph nodes (14.5 in the primary surgical vs. 16.0 in the neoadjuvant group, P=0.81) were similar between groups. CONCLUSION: Laparoscopic resection of rectal cancer in patients after preoperative chemoradiation treatment seems to be associated with a higher conversion rate and a longer duration of surgery. No change in mortality and morbidity was detected. We encourage further investigation of laparoscopic rectal surgery for treatment of rectal cancer.

    Title The Influence of Prior Abdominal Operations on Conversion and Complication Rates in Laparoscopic Colorectal Surgery.
    Date January 2007
    Journal Jsls : Journal of the Society of Laparoendoscopic Surgeons / Society of Laparoendoscopic Surgeons

    BACKGROUND AND OBJECTIVES: A history of a prior abdominal operation is common among patients presenting for laparoscopic colorectal surgery, and its impact on conversion and complication rates has been insufficiently studied. This study compares the conversion rates of patients with and without a prior abdominal operation (PAO). METHODS: We analyzed 1000 consecutive laparoscopic colorectal resection cases. RESULTS: Complete data on past surgical history were available on 820 of 1000 patients. The overall conversion rate was 14.8% (122/820). A history of PAO was present in 347 patients (42.3%). These patients experienced a higher conversion rate compared with non-PAO patients (68/347, 19.6% versus 54/473, 11.4%; P < 0.001; OR 1.9). Patients with PAO had a significantly higher rate of inadvertent enterotomy (5/347, 1.4% vs. 1/473, 0.2%; P = 0.04; OR 6.9), a higher incidence of postoperative ileus (23/347, 6.6% vs 14/473% 3.0; P = 0.012; OR 2.3), and higher reoperative rates (8/347, 2.3% vs 1/473, 0.2%; P = 0.006; OR 11.1). The incidence of other complications and mortality (total 6/820, 0.7%) was similar regardless of PAO status. CONCLUSION: Having a prior abdominal operation represents a risk factor for conversion in laparoscopic colon and rectal surgery. The incidence of a successfully completed laparoscopic operation, however, remains high in previously operated on patients.

    Title Has the 80-hour Work Week Had an Impact on Voluntary Attrition in General Surgery Residency Programs?
    Date March 2006
    Journal Journal of the American College of Surgeons

    BACKGROUND: This article attempts to assess the effect of the duty-hour limitations implemented in 2003 on voluntary withdrawal of general surgery residents. STUDY DESIGN: A questionnaire asked the program directors how many categorical general surgery residents left voluntarily in 2003 to 2004, their training levels, why they left, and where they went. Results were compared with an identical study of 2000 to 2001 and analyzed statistically using chi-square analysis. RESULTS: A total of 215 programs (85%) responded, compared with 206 programs (81%) in the previous study. One hundred two programs (48%) reported voluntary attrition of 148 residents, compared with 110 programs (53%) and 167 residents previously. An average of 1.5 residents per program left in programs that reported attrition and 0.7 residents per program in all responders, compared with 1.5 and 0.8 residents in the previous study. In both studies, most programs with attrition lost one (66% [2000 to 2001] and 65% [2003 to 2004]) or two residents (21% [2000 to 2001] and 27% [2003 to 2004]). Most attrition occurred at PGY1 (47%) and PGY2 (28%) levels; a total of 75% of all attrition occurred at these levels, compared with a total of 76% in the previous study. One hundred eleven residents (75%) entered other medical specialties, and 23 (16%) transferred to other general surgery programs, compared with 105 residents (63%) and 40 residents (24%) in the previous study. In both studies, personal issues and work hours/lifestyle were cited as the most common reasons for leaving. In each study, the net loss to general surgery (the number of residents who left voluntarily divided by the total resident population at risk) was 3% for that academic year. Analysis showed no statistically significant difference. CONCLUSIONS: Rates and patterns of attrition seem to have been unaffected by Accreditation Council for Graduate Medical Education work-hours limitations.

    Title Comparing Results of Residents and Attending Surgeons to Determine Whether Laparoscopic Colectomy is Safe.
    Date July 2005
    Journal American Journal of Surgery

    BACKGROUND: This study was undertaken to compare the technical success and outcomes of laparoscopic colectomy performed by resident surgeons (RS) and attending surgeons (AS). METHODS: A review of 451 consecutive laparoscopic colectomies performed by 2 surgeons either with or without a general surgery resident. Data reviewed included demographics, diagnoses, operative data, and outcomes. Comparison was made between patients operated on by RS under attending surgeon supervision, and patients operated on by AS alone. RESULTS: Of 451 patients, 324 were operated on by RS and 127 by AS. The mean age and preoperative diagnoses were similar between groups. Operative time was significantly longer in the RS group (155 minutes vs. 128 minutes, P < .05). Blood loss was slightly higher in RS groups but was not statistically significant (191 mL vs. 174 mL, P = .31). The incidence of conversion to an open procedure, postoperative complications, and length of stay were similar between groups. CONCLUSIONS: Supervised RS can safely perform laparoscopic colectomy with results similar to AS. RS take longer to perform the procedure than AS.

    Title Attrition and Replacement of General Surgery Residents.
    Date February 2005
    Journal The Surgical Clinics of North America
    Title Conversion of Laparoscopic Colon Resection Does Not Affect Survival in Colon Cancer.
    Journal Surgical Endoscopy

    BACKGROUND: Laparoscopic and open resections of colon cancer are considered oncologically equivalent treatment methods. Conversion of laparoscopic procedures, however, was associated with decreased survival in colon cancer patients in the only prior study examining this question. We conducted this study to evaluate the effect of conversion on survival. METHODS: A series of consecutive patients treated with laparoscopic resection of colorectal cancer (n = 174) in the period 1998-2003 was evaluated retrospectively. Median follow-up was 51 months with a minimum of 3 years. RESULTS: There was no statistically significant difference in all-cause mortality between laparoscopically completed and converted groups (22/143, 15.4% versus 8/31, 25.8%; OR 1.9, p = 0.164). Kaplan-Meier survival analysis did not show any survival difference between the two groups (p = 0.266). CONCLUSIONS: The results of our study suggest there is no survival difference in patients requiring conversion of laparoscopic resection indicated for colorectal cancer. Further examination of this question is warranted to determine whether laparoscopic resection of colorectal cancer should be offered to all patients, including those at high risk for conversion.

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