When the dangerous illness of three siblings leaves doctors baffled, pathologist Celia Grange, MD, traces the threat to an innocent source no one suspected.

Cast:

• Narrator / Sage Whitlock: Elizabeth V. McLeod, MD, MS, FCAP

• Dr. Norah Quinn: Bobbi S. Pritt, MD, MSc, FCAP

• Dr. Celia Grange: Xiaoyin “Sara” Jiang, MD, FCAP

• Nurse Elle Ranger: Jennifer Dien Bard, PhD, D(ABMM)

• Marina Harris: Leah Militello, MD, MBA, FCAP

• Daniel Harris: Daniel E. Sabath, MD, PhD

• Ada Harris: Dorothy M. Adcock, MD, FCAP

• Voiceover Intro/Outro: Robert Frick, MD, FCAP

• Technical advisors: Jason V. Scapa, MD, FCAP, and Bobbi S. Pritt, MD, MSc, FCAP, with contributions from Elizabeth V. McLeod, MD, MS, FCAP; Thomas J. Cooper Jr., MD, FCAP; Xiaoyin "Sara" Jiang, MD, FCAP; and Feifan Fred Chen, MD, FCAP

This episode of Case Encounters is inspired by a real-life pathology case submitted by Michelle Aurelius, MD, FCAP, member of The College of American Pathologists.

To learn more about the work a pathologist does on your lab test, visit yourpathologist.org.

Case Encounters is a production of The College of American Pathologists, with creative direction from StudioNorth.

Executive Producer: Robert Johnson

Creative direction by StudioNorth

Produced and directed by Natalie Gregory

Editing, sound design, and original music by Jake Sorgen

Written by Paige Freeborn for StudioNorth

Special thanks to Justin Charlton-Perrin and Clemmie Lozano

Additional production support from Nefsi Williams, Isabelle Ritz, and Anabella Torres

Copyright 2025 The College of American Pathologists

Hosted on Ausha. See ausha.co/privacy-policy for more information.