Leaders in the Field
Our board certified and Maryland licensed pathologists are experts in their respective fields, and hold medical licenses from the states of MD, VA and D.C. They continuously update their knowledge to the latest scientific standards and consistently participate in continuing medical education to enhance their expertise and stay up-to-date on critical advancements in research and technology. Our staff works together as a team as well as with national experts to ensure accurate and prompt results every time.

OUR MEDICAL DIRECTOR
Carla B. MacLeod M.D.
Areas of special interest: Cytopathology, GI pathology, Molecular pathology, Digital pathology
- Board Certified: Anatomic & Clinical Pathology, Cytopathology
- Surgical Pathology & Cytopathology Fellowship, Medical College of Virginia
- Biotechnology Fellowship, National Institute of Health
- Pathology Residency, Anatomic & Clinical Pathology, Washington Hospital Center
OUR PATHOLOGISTS
Huimin Guo M.D.
Areas of special interest: Cytopathology, Hematopathology, lymph node pathology
- Board Certified: Anatomic & Clinical Pathology, Cytopathology
- Anatomic & Clinical Pathology Residency, Georgetown University Hospital
- Hematopathology Fellowship, University of Maryland School of Medicine
- Cytopathology Fellowship, Memorial Slone Keterring Cancer Center

Rachel Katz M.D.
Areas of special interest: GI pathology, Gyn & breast pathology, Gyn cytology
- GI Clinical Pathology Rotation (2011), Johns Hopkins University Medical Center
- Board Certified: Anatomic & Clinical Pathology
- Anatomic & Clinical Pathology Residency, National Naval Medical Center
- Obstetric & Gynecology Internship, National Naval Medical Center

Elizabeth Martin M.D.
Areas of special interest: GI & liver pathology, Breast pathology, Cytopathology, Medical microbiology
- Board Certified: Anatomic & Clinical Pathology
- Board Certified: Cytopathology
- Anatomic & Clinical Pathology Residency, Tufts-New England Medical Center
- Surgery Internship & Residency, Hartford Hospital
Nancy S. Dow M.D.
Areas of special interest: GI pathology, Immunopathology, Flow cytometry
- Board Certified: Anatomic & Clinical Pathology, Immunopathology
- Anatomic & Clinical Pathology Residency, University of Kansas Medical Center
- Gastrointestinal Pathology Fellowship, Armed Forces Institute of Pathology (AFIP)
- Immunopathology Fellowship, Walter Reed Army Medical Center
- Surgical Pathology & Cytopathology Fellowship, University of Connecticut School of Medicine
- Anatomic & Clinical Pathology Residency, University of Kansas Medical Center
- Acting Chief, Division of Gastrointestinal Pathology (2009 -2011), Armed Forces Institute of Pathology (AFIP)

OUR LABORATORY STAFF
The technical staff and office staff are expert technologists, technicians and office personnel with superb communication skills and total personal commitment to the laboratory.
Tess Ylaya, HTL, ASCP, Laboratory Manager, Chief Histotechnologist
B.S. Medical Technology
Registered Histotechnologist, ASCP
Glenn Ylaya, Office Manager
B.S. Anatomy & Neurophysiology, University of Maryland College Park
Genetics Internship, Uniformed Services of the Health Services (USUHS)