University of California San Francisco

Division History

The history of pediatric surgery at the University of California, San Francisco (UCSF) is essentially the history of pediatric surgery in Northern California, which began with a single surgeon: Dr. Alfred deLorimier.

Alfred deLorimier and the nascent field of pediatric surgery

Alfred deLorimier Alfred deLorimier grew up in San Francisco, attended the University of California, Berkeley for undergraduate studies, and later UCSF for medical school. He decided to become a general surgeon and stayed on to train at UCSF at a time when there was no real subspecialty of pediatric surgery established in California. Toward the end of his training in general surgery, he became interested in the surgery of children, in particular the emerging specialty of pediatric surgery which was taking shape in a few centers in the East, where a few trepid young surgeons were devoting their careers to this new field. Alfred deLorimier was determined to became one of those pioneers and signed up to spend two years learning the intricacies of children's surgery at Ohio State University's Columbus Children's Hospital. Interestingly, he went through this very demanding program with Dr. Eric Fonkalsrud from the University of California, Los Angeles. When Fonkalsrud returned to Los Angeles and deLorimier returned to San Francisco as the first fellowship-trained pediatric surgeons, they established the specialty of pediatric surgery in California.

Over the next 40 years, Alfred deLorimier devoted himself to developing the specialty of pediatric surgery at UCSF and in Northern California. He built a thriving practice devoted entirely to children, working primarily at UCSF Moffit-Long and San Francisco General Hospitals, but also covering California Pacific Medical Center and eventually Mt. Zion and Kaiser San Francisco. He founded the Division of Pediatric Surgery at UCSF and single handedly managed his prosperous practice (ably assisted by his wife, Sandy, in the office). He established the Division and managed to obtain funding for basic research in the physiology of diaphragmatic hernia in fetal lambs at a time when most surgeons did not even attempt research.

Dr. Michael Harrison begins research into fetal diagnosis & therapy


In January 1978, deLorimier recruited Dr. Michael Harrison who was just finishing his pediatric surgery fellowship at Children's Hospital Los Angeles. For the next 10 years, these two shared a growing practice, heavy on complex surgical reconstruction in children, particularly for babies with birth defects. The Division continued to thrive under deLorimier's leadership. This was a very busy time when the exciting work in a brand new field attracted talented young surgeons from all over the world to work in the Division and field research laboratory. Harrison devoted himself (and later many bright young surgical research fellows) to developing the new field of fetal diagnosis and therapy. They developed fetal animal models of fetal diseases and applied what they learned in the first fetal surgeries in the world.

In the late '80s and early '90s, UCSF Pediatric Surgery began to take off with the addition of new faculty, first Dr. N. Scott Adzick who had been a research fellow in the laboratory and completed his training at Boston Children's Hospital, then Dr. Alan Flake who had also been a research fellow in the laboratory and finished his training at Cincinnati Children's Hospital. The clinical enterprise continued to grow, and there was a burgeoning new fetal treatment enterprise which proved to be very productive from a research and clinical perspective.

Growth of the UCSF Division of Pediatric Surgery 

When Harrison retired as Division Chief in 2003, Diana Farmer stepped in and continued to expand the Division in scope and personnel until she left to become the Chair of Department of Surgery at UC Davis. Dr. Hanmin Lee, who was recruited from Emory University in 2000, tooks the reins of the Division and the children's hospital as the Division Chief in 2011 and Surgeon-in-Chief in 2012.  Under his leadership, the new Benioff Children's Hospital opened at Mission Bay in 2015 and the division expanded to include the pediatric surgeons at the children's hospital in Oakland in 2018.  

Our Division has grown remarkably from deLorimier, who founded it alone more than 40 years ago, to a thriving Division of four active and very productive pediatric surgeons today. Along the way the Division has made amazing contributions to pediatric surgery, the management of tumors in children, the correction of congenital anomalies in newborns, surgical innovations, and the founding of the field of fetal diagnosis and therapy. Perhaps even more amazing is the number of talented young surgeons the Division has trained clinically and in the research laboratories. More than 40 trainees and surgeons have gone on to make significant contributions in pediatric and fetal surgery throughout the world.

Uniting UCSF Benioff Children's Hospital and Children's Hospital Oakland

In 2018, the outstanding pediatric surgery teams at UCSF and Children's Hopital Oakland came together under the UCSF Benioff Children's Hospital and UCSF Department of Surgery umbrella. This internationally recognized group of surgeons, who share a strong common commitment to the care of all children, is based at UCSF Benioff Children's Hospital Oakland and Benioff Children's Hospital San Francisco. Our team provides care of children from Northern California and beyond. We also have a strong continued commitment to research with extensive funding from prestigious organizations such as the National Institutes of Health, the Food and Drug Administration, and the California Institute of Regenerative Medicine. With the broad- based expertise of our merged group, we started a pediatric surgery fellowship program to train the next generation of leaders in pediatric surgery.