Henry Tazelaar, M.D., Named Recipient of Geraldine Colby Zeiler Professorship in Cytopathology

Henry Tazelaar, M.D.

The Mayo Clinic Named Professorship Committee, with approval from the Board of Governors, has named Henry Tazelaar, M.D., the recipient of the Geraldine Colby Zeiler Professorship in Cytopathology—one of Mayo's highest honors.

About the Colby Zeiler Professorship in Cytopathology
The professorship was established in 1992 by William B. Zeiler, M.D.—in conjunction with the College of American Pathologists Foundation—in memory of Dr. Zeiler's wife of 38 years. Geraldine Colby Zeiler trained as a cytology technician at Mayo in 1950.

Named professorships at Mayo Clinic represent the highest academic distinction for a faculty member. Faculty members are appointed through peer nomination and confirmed by Mayo's senior leadership. Appointed individuals are recognized for distinguished achievement in their specialty areas and service to the institution.

About Dr. Tazelaar
Dr. Henry Tazelaar is Chair of the Department of Laboratory Medicine and Pathology at Mayo Clinic in Arizona, and he is a Consultant in the Division of Anatomic Pathology in Arizona. Dr. Tazelaar also serves as Chair of the Laboratory Medicine and Pathology Specialty Council. He joined the staff of Mayo Clinic in 1988 and holds the academic rank of Professor of Laboratory Medicine and Pathology.

Dr. Tazelaar earned his Bachelor of Arts degree at Calvin College in Grand Rapids, Michigan, and his M.D. at Rush Medical College in Chicago. He completed both an internship and residency in pathology at Stanford University Medical Center, followed by a National Institutes of Health postdoctoral fellowship in the pathology of heart-lung transplantation in the laboratory of Dr. Margaret Billingham at Stanford University Medical Center, where he subsequently completed a fellowship in surgical pathology.

Dr. Tazelaar’s work has focused on refining criteria used to diagnose the rejection of transplanted hearts and lungs. He is also active in identifying new pulmonary diseases and better understanding how systemic diseases affect the lungs and pleura. His observations have led to the identification of several new or unusual pulmonary diseases.

Clinically, Dr. Tazelaar is a surgical pathologist, a role that includes a large thoracic consultation practice offering second opinions on biopsy and cytology specimens. He is also an active educator, providing mentorship to a multitude of residents and fellows. In addition, he has taught in the Cytotechnology Program of the Mayo Clinic School of Health Sciences and Mayo Clinic School of Medicine.

Dr. Tazelaar is a fellow of the American College of Chest Physicians and College of American Pathologists, where he is a member of the Pulmonary and Mediastinum Tumors Cancer Protocol Review Panel. He is active in many other professional organizations, serving on numerous committees and in leadership roles, including a tenure as president of the Pulmonary Pathology Society. He was also a member of the International Society for Heart and Lung Transplantation groups that standardize reporting of heart and lung rejection. Dr. Tazelaar is currently Treasurer of the International Academy of Pathology and Chair of the Finance Committee of the United States and Canadian Academy of Pathology.

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April Josselyn is a Marketing Channel Manager at Mayo Clinic Laboratories. She has worked at Mayo Clinic since 2012. Outside of work, April enjoys the outdoors and being "hockey mom" for her two sports-crazed boys.