Karleen Meiklejohn, M.D.

Assistant Professor of Clinical Pathology

To see if Karleen Meiklejohn is accepting new patients, or for assistance finding a UC Davis doctor, please call 800-2-UCDAVIS (800-282-3284).



Surgical Pathology



Pathology - Cytopathology

Pathology - Surgical

Locations and Contact

Clinical Interests

Dr. Meiklejohn is a board-certified anatomic and clinical pathologist, with subspecialty fellowships in head and neck, endocrine, and cytopathology. Alongside her cytopathology fellowship, she received comprehensive training in th performance of palpable and ultrasound-guided fine needle aspiration biopsies. She has special clinical interest in cancers of the oral cavity, oropharynx, and larynx, as well as virus-driven cancers of the head and neck.

Research/Academic Interests

Dr. Meiklejohn’s research focuses on the patterns and diagnosis of various head, neck and endocrine cancers with the hopes of encouranging early diagnosis and improving patient outcomes.

Center/Program Affiliation

UC Davis Comprehensive Cancer Center

Undergraduate School

B.Sc., Biology, University of British Columbia - Okanagan, 2012

Medical School

M.D., St. Matthew's University School of Medicine, 2016


Anatomic and Clinical Pathology, Banner University Medical Center (University of Arizona), 2017-2021


Head, Neck and Endocrine Pathology, Yale-New Haven Hospital, 2021-2022


Cytopathology, Memorial Sloan Kettering Cancer Center, 2022-2023

CAPF Leadership Development Award, College of American Pathologists Foundation, 2020, 2020

Podany P, Meiklejohn KM, Garritano J, Holt EH, Ogilvie J, Barbieri A, Prasad ML, Gilani SM. Medullary Thyroid Carcinoma: Use of Grading System and Correlation of Histologic Features with Lymph Node Metastasis. Ann Diagn Pathol. 2023; 64:152112. doi: 10.1016/j.anndiagpath.2023.152112

Meiklejohn KM, Hrones M, Wang M, Prasad ML, Cai G, Adeniran A, Gilani SM. Diagnosis of Acinic Cell Carcinoma on Cytology Specimens: Role of NOR-1 (NR4A3) Immunohistochemistry. Cytopathol. 2023; 34(3):219-224. doi: 10.1111/cyt.13222

Meiklejohn KM, Darbinyan A, Barbieri AL. A review of DICER1: structure, function and contribution to disease. Diagn Histopathol. 2022; 28(7):329-336. doi: 10.1016/j.mpdhp.2022.05.004

Batai K, Phung M, Bell R, Lwin A, Hynes KA, Price E, Meiklejohn KM, Bracamonte ER, Funk JT. Correlation between body mass index and prostate volume in benign prostatic hyperplasia patients undergoing holmium enucleation of the prostate surgery. BMC Urol. 2021; 21(1):88, doi: 10.1186/s12894-020-00753-9

Meiklejohn KM, Parks B. Congenital Pulmonary Lymphangiectasia: A Rare Cause of a Common Condition. Arch Pathol Lab Med. 2020; 144 (9s1): e2–e212. doi: 10.5858/arpa.2020-0991-AB

Meiklejohn KM, Rush D. An Uncommon Case of Placental Coccidioidomycosis. Arch Pathol Lab Med. 2020; 144 (9s1): e2–e212. doi: 10.5858/arpa.2020-0991-AB

Meiklejohn KM, Klein R. A Rare Primary Hemangioma of the Thyroid. Arch Pathol Lab Med. 2020; 144 (9s1): e2–e212. doi: 10.5858/arpa.2020-0991-AB