Information for Our Community

Whether you are part of our community or are interested in joining us, we welcome you to Washington University School of Medicine.


Louis P. Dehner, MD

Louis P. “Pepper” Dehner, MD, is professor of pathology and immunology and professor of pathology in pediatrics. Dehner is internationally recognized for his expertise as a surgical pathologist and for his work in the diagnosis of childhood neoplasms.

Dehner received his medical degree from Washington University in 1966 and was elected to Alpha Omega Alpha. He completed his residency in anatomic pathology at Barnes Hospital in 1971 and then joined the faculty. In 1974 he left for the University of Minnesota Medical School, eventually becoming director of anatomic pathology. He returned to Washington University in 1989 as professor and Director of Anatomic Pathology and surgical pathologist-in-chief at Barnes-Jewish Hospital. In 1991, he became pathologist-in-chief at St. Louis Children’s Hospital.

In 1975, Dehner published the first edition of his Pediatric Surgical Pathology, which describes the diagnosis of children’s disease as seen through the eyes of a surgical pathologist. His scholarly inquiry focuses on tumefactive processes in children. A portion of his consultation practice is concerned with childhood neoplasms, and he is consulted by pathologists, pediatric oncologists and parents worldwide.

Dehner’s dedication to patient care, his expertise in tissue diagnosis and his lively but thorough discussions during signout sessions remain today powerful sources of instruction for students, residents and faculty alike.

Dehner has authored more than 35 books and book chapters, published more than 340 peer-review papers and has held editorial board responsibilities for several renowned journals. He has received numerous awards and invitations to speak around the world. He was elected Councilor of the United States Canadian Academy of Pathology and later served as its president. Dehner has been honored with the President’s Award from the Pediatric Pathology Society and the Washington University Medical Center Alumni Association Faculty Alumni Award.

Published: 03/23/2008