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Assistant Professor of Surgery
City of Hope National Medical Center

Breast Surgery


Pelvic Pain and Minimally Invasive Gynecology Surgery
Clinical Assistant Professor of Obstetrics & Gynecology

Chronic Pelvic Pain
Pelvic Pain
Minimally Invasive Gynecology Surgery
Robotic Surgery
Global Endometrial Ablation
Interstitial Cystitis – Painful Bladder Syndrome


Professor of Surgery

Office / Outpatient Management of Anorectal Problems
Avoiding the Pitfalls of Anorectal Surgery
Management of Anal Incontinence
Management of Rectal Prolapse
Differential Diagnosis and Treatment of Bowel Evacuation Problems
Sphincter – Saving Operation – Is the Miles Resection Absolute?
The Miles Resection
The Oral Examination Process – Teaching the Examiners Video
Management of Diverticulitis
Management of Anal Cancer
Management of Ulcerative Colitis
Management of Crohn’s Disease
Colorectal Trauma
Screening of Colorectal Cancer

He was fantastic!. He was very engaging and knowledgeable. Evaluations on him were all excellent. – Palisades Medical Center

Chief, Vascular Surgery
Professor of Vascular Research

Stroke Prevention
Abdominal Aortic Aneurysm
Principles of Wound Care
Limb Salvage
Vascular Surgery for Limb Salvage
Veins, Pains, and Cosmetic Gains

His presentation was extremely well received! – Mercy Hospital

Director, Breast Cancer Survivorship Program
City of Hope National Medical Center

Breast Cancer Risk Reduction
Breast Health
Management of Breast Lumps
Update on Clinical and Diagnostic Exams for Breast Cancer Detection
New Surgical Techniques in Breast Cancer Treatment
Overview of Treatment for Breast Cancer
Evaluation of a Lump in the Neck
Thyroid and Intra-Oral Cancer: The Importance of Clinical Examination in Early Diagnosis
Risk- Managed Care of the Cancer Patient
The Beneficial Effects of Exercise During Chemotherapy as Therapy for Cancer Patient Fatigue


Assistant Clinical Professor
City of Hope National Medical Center


Cancer Modalities and Controversies
Diet, Culture, and Gastric Cancer
Hepatic Metastasectomy
Climbing the ALLPS: A New Approach to Liver Resection
Pre-Operative Radiation Dose Schedules for Rectal Cancer
Targeted Therapies for Advanced Melanoma
Gastrointestinal Cancer
Colorectal Cancer
Basal Cell Carcinoma
Liver/Pancreas/Bile Duct Cancers

Hans Francis Schoellhammer, M.D. earned his bachelors degree in Molecular and Cell Biology with an emphasis in Immunology from the University of California at Berkeley and subsequently attended medical school at Drexel University College of Medicine, Philadelphia, PA. He did his internship in general surgery at Harbor-UCLA Medical Center in Torrance, CA where he received the Intern of the Year Award from the Department of Surgery. In 2005, he began his residency at the same institution. During his residency, Dr. Schoellhammer became a post-doctoral research fellow in the Department of Melanoma Research at the John Wayne Cancer Institute in Santa Monica, CA, and then returned to Harbor-UCLA as a senior resident in general surgery. He was then appointed chief resident in general surgery in 2011. In 2012, he began a surgical oncology fellowship at the City of Hope, and has recently been appointed on the faculty as an assistant clinical professor of surgery at City of Hopes Antelope Valley community practice. Dr. Schoellhammer is an active member of several professional organizations. He is an associate fellow of the American College of Surgeons and a candidate member of both the Society of Surgical Oncology and the Association for Academic Surgery. He has served as a mentor to multiple trainees and has also been a mentor to undergraduate students at MIT who were accepted to the Eugene and Ruth Roberts Summer Student Academy at City of Hope. Dr. Schoellhammer has been invited to speak at multiple educational conferences, both locally and nationally. He has published 14 papers in the peer-reviewed literature, and is involved in several ongoing research studies and projects.

Director, Pancreas Transplantation
USC University Hospital
Assistant Professor of Surgery
Keck School of Medicine of USC

Hepatocellular Carcinoma
Pancreatic Cancer
Liver Transplantation
Pancreas Transplantation


Assistant Professor, Division of Thoracic Surgery, Department of Surgery
City of Hope National Medical Center

Lung Cancer
Esophageal Cancer
Minimally Invasive Surgery
Robotic Surgery


Associate Clinical Professor of Surgery
Division of Plastic Surgery
City of Hope National Medical Center

Breast Cancer
Breast Reconstruction

As a surgeon specializing in breast reconstruction, Mark Tan, M.D., is passionate about matching the right reconstructive procedure to each patient, for the best possible results. “There are no bad choices in terms of reconstruction if patients are selected carefully,” he says. A graduate of Northwestern University Medical School, Dr. Tan joined City of Hope in 2006 after serving as a physician in private practice in Illinois and as a clinical specialist at MD Anderson Cancer Center in Houston, Texas. “Our goal,” he says, “is to try to get patients to the point in their lives where they are no longer constantly reminded of their breast cancer diagnosis, their body image has been restored and they can get on with their lives.”

Assistant Clinical Professor of Surgical Oncology
Department of Surgery
City of Hope National Medical Center

T-cells and Adoptive Immunotherapy in the Treatment of Cancer

Researcher, instructor and board-certified surgeon Poornima Rao, M.D. is a key member of City of Hope’s team in South Pasadena where she’s served since 2010. After receiving her medical degree at New York Medical College, Dr. Rao spent eight years at the renowned Cleveland Clinic, rising to Chief Resident while simultaneously working as an anatomy instructor at the Clinic’s Lerner College of Medicine. The much-published Dr. Rao has a keen interest in the role of T-cells and adoptive immunotherapy in the treatment of cancer, an area she has studied and written about for more than a decade.