Friends, Colleagues and Laboratory Heroes
Samuel A. Yousem, MD: a mentor's legacy in lung pathology
Dr. Samuel Yousem was the head of anatomic pathology during my training at Pittsburgh, and a mentor of mine. His mentorship helped me reach an early milestone: a Pulmonary Pathology Society award for my work on mesothelioma.
In 2004, I gave a platform presentation at the USCAP meeting in Vancouver: 'Molecular Pathology Analysis of Mesothelial Cell Hyperplasia and Mesothelioma Assists Diagnosis.' It won the Pulmonary Pathology Society Best Presentation Award. Sam was among the authors. That award is part of my professional history. His mentorship is part of the personal story behind it.
A pathologist's legacy lives in more than the papers they publish. It also lives in how other people learn to think.
Sam helped shape pulmonary pathology through research, teaching and the way he organized care. His work on lung transplantation and biopsy surveillance for rejection brought him invitations to teach around the world.
He trained in anatomic pathology at Stanford, where his interest in lung pathology developed through work with Dr. Charles Carrington. After working at the Armed Forces Institute of Pathology, he joined the University of Pittsburgh and became a leader in anatomic pathology.
The University of Pittsburgh's remembrance describes a teacher who used stories to make lessons memorable. A former trainee recalled the care he took to walk learners through the thinking behind a difficult diagnosis. That is a lasting contribution: helping the next pathologist understand how to reach an answer, rather than simply giving one.
Sam also helped build an organ-based subspecialty system at UPMC and supported new methods, including molecular diagnostics and telepathology. His career connected deep expertise with a willingness to change how that expertise could reach others. The Pulmonary Pathology Society's council archive records his later service as program committee chair from 2006 to 2008.
He died on August 17, 2021, at 64. Remembering him means remembering the scientist and teacher, and the mentor who helped me take an early step in my own career.
The thread through our laboratory heroes
In remembering Freida Carson, I wrote about getting the tissue and slide right before interpretation begins. In remembering Gene Herbek, I returned to patient care first, and to a pathologist's responsibility to help patients understand their diagnosis. Sam's story adds the mentor who helps a trainee build the knowledge and judgment that work requires.
There is a connection to our Yale AI second-check piece too: a tool can prompt another look, but the pathologist still has to weigh the evidence. Sam's work in molecular diagnostics and telepathology belongs to a longer history of pathologists using new methods while teaching the thinking behind a diagnosis.
These are different lives, not interchangeable lessons. What brings them together here is the care they took with the work, and with the people learning to do it.
Remembering Dr. Samuel A. Yousem, my mentor and one of my laboratory heroes.
Dr. Deepak Mohan
Doctor's Doc MD
Sources for the tribute
University of Pittsburgh remembrance, September 9, 2021: biography, teaching, lung transplantation, molecular diagnostics and telepathology.
Pulmonary Pathology Society history: trainee presentation awards at USCAP. Society council archive: Yousem's program committee role, 2006-2008.
Historical meeting-abstract record: USCAP's 93rd Annual Meeting, March 6-12, 2004, Vancouver, British Columbia, Canada.