Develop your diagnostic expertise.

Clinical reasoning from global experts — one case at a time. For free.


clinical reasoning



on expert cases



your students


About the ECR Series

Case-based format

The ECR series utilizes a clinical problem-solving format that allows you to receive and digest information the way it would be received in a real clinical scenario.

Parallel expert commentary

The series includes meta-cognitive commentary from an expert diagnostician. This parallel process allows the reader to understand the framework by which the clinician solves — or doesn’t solve! — the case.

Core concepts explained

We present clinical reasoning concept explanations together with ECR cases highlighting that concept.

Teaching slides

Each case includes downloadable teaching slides with an embedded instructor’s guide.

Community driven

We hope that the ECR website will inspire others to use clinical reasoning concepts to enhance their teaching, and submit their work to the JGIM ECR series.​


All content published on this website is free to use. (But please give us credit if our work is used!)

Become an expert diagnostician — one case at a time.

Concepts • Cases • Teaching Materials

Meet the Team

Gabrielle Berger, MD​ is an Assistant Professor of General Internal Medicine at the University of Washington Medical Center. She is an assistant program director for the UW Internal Medicine Residency and directs the residency’s Clinician-Educator Pathway. Dr. Berger earned her M.D. from Emory University in Atlanta, Georgia. She was a chief resident at San Francisco General Hospital prior to joining UW Medicine.
Juan N. Lessing MD, FACP​ is an Assistant Professor of Medicine in the Division of Hospital Medicine, Department of Medicine, at the University of Colorado. He serves as the University of Colorado Hospital Internal Medicine Clerkship Site Director. He graduated with a degree in Art and Archaeology from Princeton University; medical school at the University of California, San Francisco; and completed residency and chief residency at the University of Washington, Seattle.
Denise M. Connor, MD​ is an Associate Professor of Clinical Medicine at the University of California, San Francisco (UCSF) based at the VA Medical Center. She is Associate Director of PRIME Residency program and Director of the Diagnostic Reasoning Block for second-year medical students. She earned her MD from the University of Pennsylvania, School of Medicine.​
Jeffrey Kohlwes MD, MPH​ is a Professor of Clinical Medicine in General Internal Medicine and Director of the PRIME Residency program at the University of California, San Francisco based at the Veterans Affairs Medical Center. He earned his MD from Dartmouth College and public health degree from the University of Washington. He is also the Associate Editor for Clinical Content for the Journal of General Internal Medicine.

Geoffrey Stetson, MD is an Assistant Clinical Professor of Medicine at the University of California, San Francisco (UCSF) based at the VA Medical Center. He earned his MD from the University of Chicago, Pritzker School of Medicine.

Gregory Ow is an internal medicine resident at at University of California, San Francisco (UCSF). He earned his MD from UCSF.

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Designed by Gregory Ow