Our Medical Professionals
An Experienced Team United by Purpose
Our team of 20+ board-certified pathologists combines decades of diagnostic experience with a shared focus on precision, collaboration, and patient care. Many hold dual certifications and subspecialties in dermatopathology, cytopathology, and hematopathology.
Pathologists

Robyn A. Beach, MD
Dr. Beach is a board-certified pathologist with special interests in breast and gastrointestinal pathology. He joined Brown Pathology in 2007 after completing his medical degree at UT Southwestern and advanced training at Emory University and MD Anderson Cancer Center.
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Maria C. Bernier, MD
Dr. Maria Bernier joined Brown Pathology in 2018 with extensive experience in both hospital and physician practice pathology. She completed her medical training and residency at UT-Houston, followed by a surgical pathology fellowship at MD Anderson, and has a special interest in gastrointestinal pathology.
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Robin Brunnemann, MD
Dr. Brunnemann, a board-certified pathologist, brings over two decades of experience in anatomic and clinical pathology. She joined Brown Pathology in 2022 following a long tenure at Alliance Pathology Consultants.
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Vicki Chu, MD
Dr. Vicki Chu joined Brown Pathology in 2023, bringing strong academic and clinical credentials to the team. A board-certified pathologist in anatomic, clinical, and cytopathology, she trained at Baylor College of Medicine and MD Anderson and has practiced at several Houston-area hospitals.
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Amber Cockburn, MD
Dr. Amber Cockburn joined Brown Pathology in 2023 as a part-time pathologist, bringing specialized expertise in gastrointestinal pathology. She is board-certified in anatomic and clinical pathology and previously served in both national and regional pathology roles after completing her fellowship at Miraca Life Sciences.
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Pamela Anne Coleman, MD
Dr. Coleman is a board-certified pathologist with subspecialty training in surgical and cytopathology. She joined Brown Pathology in 2022 and has particular interests in breast and genitourinary pathology.
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Kyle L. Eskue, MD, FCAP
Dr. Eskue currently serves as the Medical Director of LabCorp's Houson Regional Laboratory. He is a board-certified pathologist with subspecialty certification in cytopathology. He joined Brown & Associates in 2012 and became a Partner in 2016.
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Heidi L. Evans, PhD, MD
Dr. Evans joined Brown Pathology in 2019 after a dynamic career spanning biomedical research, teaching, and clinical pathology. She is a board-certified pathologist with a Ph.D. in Bioengineering and subspecialty certification in cytopathology.
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Sarah K. Galfione, MD
Dr. Galfione is a board-certified pathologist with subspecialty certifications in dermatopathology and cytopathology. She joined Brown Pathology in 2012 and became a partner in 2018.
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Lianna Heidi Goetz, MD
Dr. Goetz joined Brown Pathology in 2024 after completing advanced training at Houston Methodist Hospital and MD Anderson Cancer Center. She is a board-certified pathologist with specialized fellowship training in surgical and breast pathology.
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Monica Griffin, MD
Dr. Griffin has over 25 years of experience in both military and civilian medical settings. She is a board-certified pathologist and joined Brown Pathology in 2024 as a part-time pathologist.
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Yan Gu, MD
Dr. Gu joined Brown Pathology in 2005 and has over two decades of experience in the field. She is a board-certified pathologist with extensive international and U.S.-based training in surgical pathology.
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M. Elaine Kling, MD
Dr. Kling has been with Brown Pathology since 2008 and serves as the Medical Laboratory Director at Memorial Hermann Sugar Land Hospital. She is a board-certified pathologist with subspecialty training in cytopathology and surgical pathology.
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Edward T. Kott, MD
Dr. Kott is a board-certified pathologist with over four decades of experience in anatomic, clinical, and cytopathology. He began working with Brown Pathology in 1980 and became a partner in 1983.
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Nisrin H. Motiwala, MD
Dr. Motiwala has a background in academic medicine and public health. She is a board-certified pathologist and joined Brown Pathology in 2021 and brings experience from both clinical practice and teaching roles.
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Huy Quang Nguyen, MD
Dr. Nguyen is a board-certified pathologist with fellowship training in surgical pathology. He joined Brown Pathology in 2022, bringing experience in both academic instruction and high-volume clinical practice.
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Steven J. O'Connor, MD
Dr. O’Connor, a board-certified pathologist, has extensive leadership experience in hospital-based pathology and medical education. He joined Brown Pathology in 1994 and currently serves as the Laboratory Medical Director at Memorial Hermann Katy Hospital.
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Jacqueline T.N. O'Hare, DO
Dr. O’Hare is a board-certified pathologist with subspecialty certification in hematopathology. She joined Brown Pathology in 2018 and brings a diverse background in academic medicine and physician pathology practice.
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Joel D. Thibodeaux, MD
Dr. Thibodeaux, in addition to being a board-certified pathologist, has a subspecialty certification in cytopathology and a strong background in academic medicine and laboratory leadership. He joined Brown Pathology in 2021 following years of faculty and physician practice experience.
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Latonia E. Tyler, MD
Dr. Tyler joined Brown Pathology in 2011 and is double-boarded in anatomic and clinical pathology. She is a board-certified pathologist with military and civilian leadership experience in clinical and transfusion pathology.
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Guy Williams, MD
Dr. Williams is a board-certified pathologist with specialized training in gynecologic pathology. He joined Brown Pathology in 2024 and is committed to delivering high-quality diagnostic care informed by a lifelong dedication to medicine.
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Pathologists' Assistants
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Sally Khalil, PA
Ms. Khalil is a certified Pathologists’ Assistant who joined Brown Pathology in 2019. She brings a strong background in clinical histopathology, laboratory science, and research, supporting pathologists within the Memorial Hermann Health System.
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Disha Vyas, PA
Mrs. Vyas joined Brown Pathology in 2023 and currently works alongside pathologists at Memorial Hermann Sugar Land Hospital. She is a certified Pathologists’ Assistant with a strong academic background and diverse experience in hospital-based pathology services.
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Location
2525 W Bellfort Ave Suite 120
Houston, TX 77054
Call
Main Phone: 713-741-6677