Karen L. Rech, M.D.

  1. Pathologist


  1. Rochester, Minnesota



Karen L. Rech, M.D. practices in the Division of Hematopathology, with a special interest in the diagnosis of malignant lymphoma.

  • Expertise in diagnosis of hematolymphoid neoplasms, including lymphoma, bone marrow disorders and histiocytic/dendritic cell neoplasms.
  • Expertise in integration of ancillary studies for diagnosis including immunohistochemistry, flow cytometry, molecular genetic testing and amyloid typing by mass spectrometry.
  • Member of the Mayo Clinic Histiocytosis Working Group.
  • Medical Director of Immunostains Laboratory, providing oversight in clinical test development and diagnostic application.

In addition to her clinical activities, Dr. Rech is active in research with particular emphasis on histiocytic neoplasms including Erdheim-Chester Disease, Rosai-Dorfman Disease and Langerhans Cell Histiocytosis.

  1. 2004
    Fellow - HematopathologyMayo Clinic in Rochester
  2. 2003
    Fellow - Surgical PathologyMayo Clinic in Rochester
  3. 2002
    Resident - Anatomic and Clinical PathologyMayo Clinic in Rochester
  4. 1998
    MD - with DistinctionUniversity of North Carolina School of Medicine
  5. 1993
    BS - Biology, with HonorsCalvin College


  1. 2005
    HematologyAmerican Board of Pathology
  2. 2004
    Anatomic & Clinical PathologyAmerican Board of Pathology

Professional memberships

  1. 2015 - present
    Member and CollaboratorMayo Clinic Histiocyte Working Group