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Speaker Topics: Surgery

Jonathan Edward Efron, MD
Associate Professor of Surgery
Chief of Ravitch Service
The Mark M Ravitch, MD Endowed Professorship in Gastrointestinal Surgery

A colon and rectal surgeon whose clinical focus includes colon and rectal cancer, inflammatory bowel disease, fecal incontinence and anorectal disorders, Dr. Efron joined Johns Hopkins Medicine from the Mayo Clinic.

He is an expert in minimally invasive and robotic procedures and colostomy-sparing procedures, such as ileal pouch and anal anastomosis.

Dr. Efron graduated from the University of Maryland School of Medicine, then completed his residency in general surgery at the North Shore University Hospital.  He served two fellowships in colon and rectal surgery at the Cleveland Clinic Florida.  He has a particular interest in the management of recurrent rectal cancer.


  • Breast Cancer Management from a Surgical Oncology Perspective

Lisa Jacobs, MD
Assistant Professor of Oncology

Dr. Jacobs specializes in melanoma and breast cancer.  Her initial practice was at the University of Missouri at the Ellis Fischel State Center, which is the designated cancer center for the state.  Since joining Johns Hopkins in 2004, she has taken a leadership role regarding clinical research trials for the surgical division of the Johns Hopkins Breast Center.

Dr. Jacobs has a clinical interest in treatment of early stage melanoma.  She has worked closely with dermatologists and medical oncologists at both Johns Hopkins University and the University of Missouri to improve awareness and care of melanoma patients by participating in educational programs and clinical research trials.

Breast cancer care has also been a focus of Dr. Jacobs' clinical practice since finishing her surgical oncology fellowship.  Her primary clinical interest is in improving overall quality of life for breast cancer patients.  To achieve that goal, she has initiated research programs in lymphedema and oncoplastic surgery, which attempts to increase the number of women eligible for breast preservation by combining lumpectomy with plastic surgery techniques to reshape the breast.



  • Melanoma

Julie Lange, MD
Associate Professor of Surgery
Associate Professor of Dermatology
Associate Professor of Oncology
Co-Director of the Melanoma Program

Dr. Lange joined the faculty of Johns Hopkins in 1994 and subsequently earned a Sc.M. in Clinical Investigation at the Johns Hopkins Bloomberg School of Public Health.  She focuses on the care of melanoma and breast cancer patients.  Dr. Lange was one of the original members of the Johns Hopkins melanoma group when it was first formed in 1995 and now serves as a clinical co-director of the Melanoma Program.  Dr. Lange introduced the sentinel node technique to Hopkins for both melanoma and breast cancer in the 1990s and has extensive experience with this technique.  She has particular interest in melanoma at extremes of age, and the factors associated with variance in melanoma care.  She has published the largest study of melanoma in children, adolescents and young adults.  She recognizes that melanoma in the older patient is a growing epidemic and has investigated the socioeconomic, demographic and healthcare factors that influence the treatment of melanoma in older persons.  She is a member of the melanoma panel of the National Comprehensive Cancer Network, a group that annually evaluates and revises national treatment guidelines for melanoma.


Martin A. Makary, MD

Associate Professor of Surgery
Associate Professor of Health Policy and Management

Dr. Makary is a surgeon specializing in laparoscopic pancreas surgery and is the surgical director of the Johns Hopkins Pancreatitis Center and Islet Transplant Program.  Dr. Makary has published over 100 scientific articles on quality and safety in healthcare.  He worked with the United Nations World Health Organization (WHO) to develop the WHO checklist and has become an international advocate for accountability in medicine.  He is a frequent guest medical commentator for CNN and FoxNews and speaks regularly on healthcare reform.  His newest book "Unaccountable", is about how common-sense solutions can fix healthcare.



  • Surgical Management of the following (including when surgery is appropriate, follow-up care, and outcomes):
  • Thyroid Pathology
  • Thyroid Cancer
  • Hyperthyroidism
  • Parathyroid Disease

Jason Prescott, MD
Assistant Professor of Surgery


Dr. Jason Prescott specializes in the surgical management of benign and malignant diseases of the parathyroid, thyroid and adrenal glands.  His expertise includes laparoscopic adrenalectomy, minimally invasive parathyroidectomy, as well as central and lateral neck dissection for metastatic thyroid cancer.

An alumnus of the National Institutes of Health Medical Scientist Training Program, Dr. Prescott leads a dedicated basic science research team that focuses on the mechanisms of thyroid oncogenesis, specifically studying the molecular underpinnings of tumor invasion and metastasis.  Dr. Prescott's work in this area has been published in peer-reviewed journals, and he has written numerous book chapters on the surgical management of endocrine disease.

Dr. Prescott's primary language is English, but he is also proficient in German.

On a personal level, Dr. Prescott attempts to remain well-rounded outside of the hospital, participating in activities such as underwater archaeological excavation of bronze-age Mediterranean cities and Tae Kwon Do, in which he holds a Black Belt.




Surgical Management of:

  • Pancreatic Cancer
  • Pancreatic Cysts
  • Primary Liver Cancer
  • Metastatic Colon Cancer to the Liver
  • Gallbladder Cancer

Matthew Weiss, M.D.
Assistant Professor of Surgery

Dr. Matthew Weiss specializes in surgery for pancreatic and liver cancer, as well as benign hepatopancreatobiliary diseases, including cystic lesions of the pancreas.  In addition to performing the Whipple procedure, he has particular expertise in minimally invasive pancreatic resections.  Dr. Weiss' clinical interests also include colorectal metastases to the liver, hepatocellular carcinomas, intrahepatic cholangiocarcinomas, bile duct cancers (Klatskin tumors), intraductal papillary mucinous neoplasms of the pancreas, neuroendocrine tumors, and gallbladder cancers.

His research interests include examining the outcomes following the utilization of minimally invasive and robotic surgery in pancreatic and liver surgery.  He is a member of the American College of Surgeons, the Society of Surgical Oncology, and the American Hepato-Pancreato-Biliary Association.



  • Pancreatic Cancer Surgery
  • Management of Pancreatic Cysts

Christopher Wolfgang, M.D.
Associate Professor of Surgery
Associate Professor of Oncology
Associate Professor of Pathology
Co-Director, Pancreatic Cancer Multidisciplinary Clinic
Director, Hepatopancreatobiliary Surgery

Christopher L. Wolfgang, M.D., Ph.D., is an Assistant Professor of Surgery at The Johns Hopkins University School of Medicine and an attending surgeon at The Johns Hopkins Hospital.  Dr. Wolfgang obtained his medical degree from Temple University School of Medicine and residency training in General Surgery at Penn State Milton S. Hershey Medical Center.  In addition, Dr. Wolfgang has obtained a Ph.D. degree in Biochemistry, also from Temple University School of Medicine.  Dr. Wolfgang has completed a research fellowship in surgical oncology from Penn State and a clinical fellowship in gastrointestinal surgery at Johns Hopkins.  His primary clinical interests are cancers and benign disease of the liver, pancreas, bile duct and gallbladder.  His major scientific interest is in the biological behavior of pancreatic cancers.



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