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John H Marks , MD

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Medical Group:

Marks Colorectal Surgical Associates
Main Line HealthCare Physician
Specialties Accepting New Patients
Colon/Rectal Surgery
  Board Certified in 1997
Yes
General Surgery
  Board Certified in 2004
No
Age: 50     Gender: M
Years in practice: 16
Areas of Clinical Interest: Colorectal Cancer
Cancer Prevention
Laparoscopic Colon & Rectal Microsurgery
Colorectal Disorders
Bowel Dysfunction

Medical School:
Jefferson Medical College

Internship:
Thomas Jefferson University Hospital

Residency:
Thomas Jefferson University Hospital

Fellowship:
Thomas Jefferson University Hospital

Primary Affiliation:  Lankenau Medical Center

* Members of the Main Line Health medical staff are affiliated with Bryn Mawr Hospital, Lankenau Medical Center, Paoli Hospital and Riddle Hospital.

Marks Colorectal Surgical Associates   (view other physicians at this practice)

Office Information

Location:
Lankenau MOB West, Suite 330
100 East Lancaster Avenue
Wynnewood, PA  19096

TEL: 610.645.9093 FAX: 610.645.9476
View Map | Get Directions

Access Information:
Public Transportation, Handicap Access

hours icon Hours: Weekdays
 
Marks Colorectal Surgical Associates
100 East Lancaster Avenue
Wynnewood, PA  19096

TEL: 610.645.9093 FAX: 610.645.9476

View Map | Get Directions

Access Information:
Public Transportation, Handicap Access

Hours:Weekdays



Statement of Practice Philosophy

To utilize advanced procedures and treatment plans combined with new technologies and microsurgery to offer our patients improved safety, comfort, and preservation of normal bowel function.

Titles

Academic Titles:
Assistant Clinical Professor of Surgery - MCP/Hahnemann University School of Medicine

Clinical/Dept Titles:

Chief, Colorectal Surgery

Recent Clinical Studies Published

CURRENT ONGOING RESEARCH PROJECTS:

Randomized Trial of Open Colectomies Versus Hand-Assisted Laparoscopic Colectomies with Intromit. Sponsored by MedTech Limited. Dublin, Ireland.

Phase III Prospective Randomized Trial Comparing Laparoscopic-Assisted Colectomy Versus Open Colectomy for Colon Cancer. National Surgical Adjuvant Breast and Bowel Project. National Cancer Institute.

A Clinical Trial to Evaluate the Worth of Preoperative Multimodality Therapy (5FU and RTX) in Patients with Operable Carcinoma of the Rectum.

Detection of Cancer Cells in Peripheral Blood of Patients with Colorectal Cancer. Immunicon Corporation.

Propective Randomized Trial on the Treatment of Rectal Cancer in T1, G2-3 and T2 G1-3 NO MO Patients: Preoperative Radiochemotherapy and Local Excision Versus Anterio Resection or Abdominperineal Resection.

PUBLICATIONS

Mohiuddin M, Regine W, Marks G, Marks J. High-Dose Preoperative Radiation and the Challenge of Sphincter Preservation Surgery for Cancer of the Distal 2cm of the Rectum. Int J Rad Onc Biol Phys, 1998; 40(3): 569-574.

Marks G, Marks J, Mohiuddin M, Brady L. Radical Sphincter Preservation Surgery With Coloanal Anastomosis Following High-Dose External Irradiation for the Very Low Lying Rectal Cancer. Recent Results in Cancer Research, Vol, 146. Peter Schlag, ed. Springer, Berlin, Germany, 1998.

Marks J, Marks G, Mohiuddin M, Masoni L. Transanal Endoscopic Microsurgery (TEM), - A Welcome Option for Local Excision of Rectal Cancer Following Preoperative Radiation or Chemoirradiation. Proceedings of the 8th International Congress of the European Association for Endoscopic Surgery. Jean Mouiel and Alberto Montori, eds. Monduzzi Editore, Bologna, Italy, 2000.

Marks J. Colorectal Cancer: Look to the Future. General Surgery News, May 2001.

Marks J, Marchionni C, Marks, G. Transanal Endoscopic Microsurgery in the Treatment of Select Rectal Cancers or Tumors Suspicious for Cancer.Surg Endos, 2003: 17(114-117).

PRESENTATIONS

November 16-17, 2007 Strasbourg, France
Educational Workshop Presentations - Advanced Course in Laparascopic Colorectal Surgery
Laparascopic Treatment of Complicated Diverticulitis.
Laparscopic TATA - TME of Hand-Sewn Coloanal Anastomosis.

November 9, 2007 - State College, PA
Podium Presentation at the Keystone Chapter American College of Surgeons Annual Meeting
Laparoscopic Treatment of Colon/Rectal Cancer

September 13-15, 2007 - Changhua, Taiwan
Second International Surgical Symposium on New Technologies Applied to MIS
1. Sigmoidectomy for Acute Sigmoiditis
2. Basic Principles for Sigmoidectomy: Sigmoiditis-Cancer
3. Laparoscopy for Inflammatory Bowel Disease.
4. Laparoscopic TATA - TME of Hand Sewn Coloanal Anastomosis.
5. Transanal Endoscopic Microsurgery for Rectal Cancer.

Rectal Cancer Management - Advances for the New Millennium. Grand Rounds, Mercy Suburban Hospital, Norristown, PA. January 9, 2004

1. Low Anterior Resection-Colon Surgery Symposium.
2. Laparoscopy in Colorectal Cancer-Colorectal Symposium.
3. TEM for Benign Rectal Pathology-Endolulmlinal Surgery Forum.
4. Radiochemotherapy and Local Excision in the USA-Transendocscopic Microsurgery and Rectal Tumors Symposium.
J. Marks, U. Kawun, W. Hamdan, G. Marks. Colorectal Symposium, 9th World Congress of Endoscopic Surgery, Cancun, Mexico. February 2-7, 2004.

Laparoscopic Transanal Abdominal Transanal (TATA) Radical Proctosigmoidectomy with Coloanal Anastomosis for Distal Rectal Cancer after High-Dose Chemoradiation. J. Marks, U. Kawun, G. Marks. Video Presentation, Society of American Gastrointestinal Endoscopic Surgeons, March 31-April 3, 2004.

Pros and Cons: Issues in General Surgery. J. Marks Moderator for session, Society of American Gastrointestinal Endoscopic Surgeons, March 31-April 3, 2004.

Transanal Microsurgery in the Treatment of Selected Rectal Cancers or Suspicious Rectal Tumors. J. Marks. Conjoint meeting of Philadelphia Academy of Surgery and New York Surgical Society, Philadelphia, PA. April 10, 2004

Transanal Endoscopic Microsurgery - Maximizing the Minimally Invasive Approach. J. Marks. 9th International Congress of European Association of Video Surgery. Gdansk, Poland. April 22-24, 2004

Colorectal Laparoscopic Surgery. J. Marks. 9th International Congress of Eurpean Association of Video Surgery. Gdansk, Poland. April 22-24, 2004.

Redefining Contraindications to Laparoscopic Colorectal Resection in High Risk Patients. U. Kawun, J. Marks, W. Hamdan, G. Marks. Podium presentation - American Society of Colon and Rectal Surgeons' Annual Meeting. Dallas, TX May 8-13, 2004.

High-Dose Preoperative Radiation/Chemoradiation and Full-Thickness Local Excision for Select Rectal Cancers. J. Marks, W. Hamdan, U. Kawun, M. Mohiuddin, G. Marks. Podium presentation - American Society of Colon and Rectal Surgeons' Annual Meeting. Dallas, TX May 8-13, 2004.

Sphincter Preservation Surgery in Distal Rectal Cancer After Preoperative Chemoradiation: Laparaoscopic Transanal Abdominal Transanal (TATA) Radical Proctosigmoidectomy with Coloanal Anastomosis. U. Kawun, J. Marks, M. Mohiuddin, G. Marks. Podium presentation - American Society of Colon and Rectal Surgeons' Annual Meeting. Dallas, TX May 8-13, 2004.

Rectal Cancer Management: Sphincter Preservation Employing Minimally Invasive Surgical Options. J. Marks Tyco U.S. Surgical Seminar. New Hyde Park, NY. May 18, 2004.

Recent Honors, Awards, Citations

2012-2014 - TOP DOCTOR - Colon & Rectal Surgery
Philadelphia Magazine

2011 - TOP DOCTOR - Colon & Rectal Surgeon
U.S. News & World Report

SPECIAL ACHIEVEMENTS

Faculty Member & Selected Presenter
Seminar on Transanal Endoscopic Microsurgery (TEM)
Society of American Gastrointestinal Endoscopic Surgeons Meeting of the Millennium
Atlanta, Georgia - March 2000.

Established and directed the newly instituted International Fellowship in colorectal Surgical Oncology at the Lankenau Institute for Medical Research - November 2000.

Selected by Richard Wolf Instrumentation Company in 2001 to head one of two training centers established in the United States for Transanal Endoscopic Microsurgery (TEM).

Organized and directed a Transanal Endoscopic Microsurgery (TEM) Workshop for surgeons at the Lankenau Institute for Medical Research in January 2001.

Community/Team Clinical Affiliations

Senior Investigator
Lankenau Institute for Medical Research
Lankenau Hospital, Wynnewood, PA.

President
Northeastern Society of Colorectal Surgeons

Secretary
International Network of Comprehensive Rectal Cancer Centers
Lankenau Hospital, Wynnewood, PA

Member - Technologies Committee
American Society of Colon and Rectal Surgeons

Member - Standards of Practice Committee
Society of American Gastrointestinal Endoscopic Surgeons

Member, Legislative Review Committee
Society of American Gastrointestinal Endoscopic Surgeons

Board Member
Colon Cancer Alliance Strategic Advisory Board

Current Memberships and Activities

American College of Surgeons
American Medical Association
Fellow, American Society of Colon and Rectal SurgeonsAssociation for Academic Surgery
American College of Physicians
Pennsylvania Medical Society
Northeastern Society of Colorectal SurgeonsPennsylvania Society of Colon and Rectal Surgeons
Philadelphia County Medical Society
Society of American Gastrointestinal Endoscopic SurgeonsSociety of Laparoendoscopic Surgeons
Society for Surgery of the Alimentary Tract

GENERAL

Specialties: Colon/Rectal Surgery (Board Certified in 1997) - Accepting New Patients
General Surgery (Board Certified in 2004) - Not Accepting New Patients
Age: 50     Gender: M
Years in practice: 16

Medical School:
Jefferson Medical College

Internship:
Thomas Jefferson University Hospital

Residency:
Thomas Jefferson University Hospital

Fellowship:
Thomas Jefferson University Hospital

Primary Affiliation:  Lankenau Medical Center

* Members of the Main Line Health medical staff are affiliated with Bryn Mawr Hospital, Lankenau Medical Center, Paoli Hospital and Riddle Hospital.

Titles

Academic Titles:
Assistant Clinical Professor of Surgery - MCP/Hahnemann University School of Medicine

Clinical/Dept Titles:

Chief, Colorectal Surgery


PRACTICE

Practice Name:
Marks Colorectal Surgical Associates

appointment icon Location:

Lankenau MOB West, Suite 330
100 East Lancaster Avenue
Wynnewood, PA  19096
TEL: 610.645.9093 FAX: 610.645.9476
transportation icon Access Information:  Public Transportation,Handicap Access
hours icon Hours: Weekdays
Areas of Clinical Interest: Colorectal Cancer
Cancer Prevention
Laparoscopic Colon & Rectal Microsurgery
Colorectal Disorders
Bowel Dysfunction

Statement of Practice Philosophy

To utilize advanced procedures and treatment plans combined with new technologies and microsurgery to offer our patients improved safety, comfort, and preservation of normal bowel function.

Patient Population
  • Adult
  • Geriatric
  • Medicare
  • HMO
  • PPO
  • Self-Pay

PUBLICATIONS & CITATIONS

Recent Clinical Studies Published

CURRENT ONGOING RESEARCH PROJECTS:

Randomized Trial of Open Colectomies Versus Hand-Assisted Laparoscopic Colectomies with Intromit. Sponsored by MedTech Limited. Dublin, Ireland.

Phase III Prospective Randomized Trial Comparing Laparoscopic-Assisted Colectomy Versus Open Colectomy for Colon Cancer. National Surgical Adjuvant Breast and Bowel Project. National Cancer Institute.

A Clinical Trial to Evaluate the Worth of Preoperative Multimodality Therapy (5FU and RTX) in Patients with Operable Carcinoma of the Rectum.

Detection of Cancer Cells in Peripheral Blood of Patients with Colorectal Cancer. Immunicon Corporation.

Propective Randomized Trial on the Treatment of Rectal Cancer in T1, G2-3 and T2 G1-3 NO MO Patients: Preoperative Radiochemotherapy and Local Excision Versus Anterio Resection or Abdominperineal Resection.

PUBLICATIONS

Mohiuddin M, Regine W, Marks G, Marks J. High-Dose Preoperative Radiation and the Challenge of Sphincter Preservation Surgery for Cancer of the Distal 2cm of the Rectum. Int J Rad Onc Biol Phys, 1998; 40(3): 569-574.

Marks G, Marks J, Mohiuddin M, Brady L. Radical Sphincter Preservation Surgery With Coloanal Anastomosis Following High-Dose External Irradiation for the Very Low Lying Rectal Cancer. Recent Results in Cancer Research, Vol, 146. Peter Schlag, ed. Springer, Berlin, Germany, 1998.

Marks J, Marks G, Mohiuddin M, Masoni L. Transanal Endoscopic Microsurgery (TEM), - A Welcome Option for Local Excision of Rectal Cancer Following Preoperative Radiation or Chemoirradiation. Proceedings of the 8th International Congress of the European Association for Endoscopic Surgery. Jean Mouiel and Alberto Montori, eds. Monduzzi Editore, Bologna, Italy, 2000.

Marks J. Colorectal Cancer: Look to the Future. General Surgery News, May 2001.

Marks J, Marchionni C, Marks, G. Transanal Endoscopic Microsurgery in the Treatment of Select Rectal Cancers or Tumors Suspicious for Cancer.Surg Endos, 2003: 17(114-117).

PRESENTATIONS

November 16-17, 2007 Strasbourg, France
Educational Workshop Presentations - Advanced Course in Laparascopic Colorectal Surgery
Laparascopic Treatment of Complicated Diverticulitis.
Laparscopic TATA - TME of Hand-Sewn Coloanal Anastomosis.

November 9, 2007 - State College, PA
Podium Presentation at the Keystone Chapter American College of Surgeons Annual Meeting
Laparoscopic Treatment of Colon/Rectal Cancer

September 13-15, 2007 - Changhua, Taiwan
Second International Surgical Symposium on New Technologies Applied to MIS
1. Sigmoidectomy for Acute Sigmoiditis
2. Basic Principles for Sigmoidectomy: Sigmoiditis-Cancer
3. Laparoscopy for Inflammatory Bowel Disease.
4. Laparoscopic TATA - TME of Hand Sewn Coloanal Anastomosis.
5. Transanal Endoscopic Microsurgery for Rectal Cancer.

Rectal Cancer Management - Advances for the New Millennium. Grand Rounds, Mercy Suburban Hospital, Norristown, PA. January 9, 2004

1. Low Anterior Resection-Colon Surgery Symposium.
2. Laparoscopy in Colorectal Cancer-Colorectal Symposium.
3. TEM for Benign Rectal Pathology-Endolulmlinal Surgery Forum.
4. Radiochemotherapy and Local Excision in the USA-Transendocscopic Microsurgery and Rectal Tumors Symposium.
J. Marks, U. Kawun, W. Hamdan, G. Marks. Colorectal Symposium, 9th World Congress of Endoscopic Surgery, Cancun, Mexico. February 2-7, 2004.

Laparoscopic Transanal Abdominal Transanal (TATA) Radical Proctosigmoidectomy with Coloanal Anastomosis for Distal Rectal Cancer after High-Dose Chemoradiation. J. Marks, U. Kawun, G. Marks. Video Presentation, Society of American Gastrointestinal Endoscopic Surgeons, March 31-April 3, 2004.

Pros and Cons: Issues in General Surgery. J. Marks Moderator for session, Society of American Gastrointestinal Endoscopic Surgeons, March 31-April 3, 2004.

Transanal Microsurgery in the Treatment of Selected Rectal Cancers or Suspicious Rectal Tumors. J. Marks. Conjoint meeting of Philadelphia Academy of Surgery and New York Surgical Society, Philadelphia, PA. April 10, 2004

Transanal Endoscopic Microsurgery - Maximizing the Minimally Invasive Approach. J. Marks. 9th International Congress of European Association of Video Surgery. Gdansk, Poland. April 22-24, 2004

Colorectal Laparoscopic Surgery. J. Marks. 9th International Congress of Eurpean Association of Video Surgery. Gdansk, Poland. April 22-24, 2004.

Redefining Contraindications to Laparoscopic Colorectal Resection in High Risk Patients. U. Kawun, J. Marks, W. Hamdan, G. Marks. Podium presentation - American Society of Colon and Rectal Surgeons' Annual Meeting. Dallas, TX May 8-13, 2004.

High-Dose Preoperative Radiation/Chemoradiation and Full-Thickness Local Excision for Select Rectal Cancers. J. Marks, W. Hamdan, U. Kawun, M. Mohiuddin, G. Marks. Podium presentation - American Society of Colon and Rectal Surgeons' Annual Meeting. Dallas, TX May 8-13, 2004.

Sphincter Preservation Surgery in Distal Rectal Cancer After Preoperative Chemoradiation: Laparaoscopic Transanal Abdominal Transanal (TATA) Radical Proctosigmoidectomy with Coloanal Anastomosis. U. Kawun, J. Marks, M. Mohiuddin, G. Marks. Podium presentation - American Society of Colon and Rectal Surgeons' Annual Meeting. Dallas, TX May 8-13, 2004.

Rectal Cancer Management: Sphincter Preservation Employing Minimally Invasive Surgical Options. J. Marks Tyco U.S. Surgical Seminar. New Hyde Park, NY. May 18, 2004.

Recent Honors, Awards, Citations

2012-2014 - TOP DOCTOR - Colon & Rectal Surgery
Philadelphia Magazine

2011 - TOP DOCTOR - Colon & Rectal Surgeon
U.S. News & World Report

SPECIAL ACHIEVEMENTS

Faculty Member & Selected Presenter
Seminar on Transanal Endoscopic Microsurgery (TEM)
Society of American Gastrointestinal Endoscopic Surgeons Meeting of the Millennium
Atlanta, Georgia - March 2000.

Established and directed the newly instituted International Fellowship in colorectal Surgical Oncology at the Lankenau Institute for Medical Research - November 2000.

Selected by Richard Wolf Instrumentation Company in 2001 to head one of two training centers established in the United States for Transanal Endoscopic Microsurgery (TEM).

Organized and directed a Transanal Endoscopic Microsurgery (TEM) Workshop for surgeons at the Lankenau Institute for Medical Research in January 2001.

Community/Team Clinical Affiliations

Senior Investigator
Lankenau Institute for Medical Research
Lankenau Hospital, Wynnewood, PA.

President
Northeastern Society of Colorectal Surgeons

Secretary
International Network of Comprehensive Rectal Cancer Centers
Lankenau Hospital, Wynnewood, PA

Member - Technologies Committee
American Society of Colon and Rectal Surgeons

Member - Standards of Practice Committee
Society of American Gastrointestinal Endoscopic Surgeons

Member, Legislative Review Committee
Society of American Gastrointestinal Endoscopic Surgeons

Board Member
Colon Cancer Alliance Strategic Advisory Board

Current Memberships and Activities

American College of Surgeons
American Medical Association
Fellow, American Society of Colon and Rectal SurgeonsAssociation for Academic Surgery
American College of Physicians
Pennsylvania Medical Society
Northeastern Society of Colorectal SurgeonsPennsylvania Society of Colon and Rectal Surgeons
Philadelphia County Medical Society
Society of American Gastrointestinal Endoscopic SurgeonsSociety of Laparoendoscopic Surgeons
Society for Surgery of the Alimentary Tract

Membership on the medical staff of any of our hospitals does not constitute an employment or agency relationship.

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