Challenging Cases in Infectious Disease Hematopathology


Although much attention is given to hematologic neoplasms in the differential diagnosis of lymphadenopathy, the patterns of infectious diseases in lymph nodes are also important to recognize. This case-based discussion will highlight 4 challenging cases of infectious disease pathology in lymph nodes, underscoring key morphologic observations and comparing and contrasting entities within the differential diagnosis for each. This session will focus on practical pointers to help you recognize these diseases in your own practice.

Originally published on April 11, 2022

Lecture Presenter

Karen A. Moser, MD

Karen A. Moser, MD

Medical Director, Hemostasis/Thrombosis Laboratory
ARUP Laboratories

Dr. Karen A. Moser is the medical director of the hemostasis and thrombosis laboratory. She is also an assistant professor at the University of Utah School of Medicine. Dr. Moser received her medical degree from Saint Louis University. She then completed an anatomic and clinical pathology residency and a hematopathology fellowship at the University of Utah School of Medicine. Dr. Moser is board certified in anatomic and clinical pathology and hematology. Her research interests include laboratory hemostasis and thrombosis testing and medical education.


After this presentation, participants will be able to:

  • Identify key features of mycobacterial infections affecting lymph nodes
  • List the triad of classic histologic features in toxoplasma lymphadenitis
  • Describe the differential diagnosis for increased plasma cells within a lymph node
  • Discuss possible causes of CD30 positive cells within a lymph node

Sponsored by:

University of Utah School of Medicine, Department of Pathology, and ARUP Laboratories