Medical Staff


Dr. Yang is the founder and medical director of Sterling Pathology National Laboratories. He received his Gastrointestinal Pathology training in Canada with Dr. Paul Manley and Dr. David Hurlbut. Dr. Manley received his training at Stanford University with a life-long dedication to Gastrointestinal Pathology and Dr. Hurlbut received his training in Boston at Harvard Deaconess Medical Center. Dr. Yang furthered his medical education with a fellowship in Surgical Pathology at UCLA, and in Gastrointestinal Pathology with Dr. Klaus Lewin, a world renowned Gastrointestinal Pathologist.


Dr. Lekov provides expertise in Gastrointestinal Pathology, Uropathology, and Dermatopathology at Sterling Pathology National Laboratories. Dr. Lekov graduated the Residency Program-AP/CP at Harbor-UCLA in 2009. She served as chief resident and was responsible for frozen section diagnosis and teaching the junior residents. She worked on several research projects resulting in papers discussing an unusual case of Lymphangioma of the Small Bowel. After finishing the residency program, she continued as the Surgical Pathology Fellow at Harbor-UCLA with a focus on Dermatopathology, which she completed in 2010.


Following training at the Howard University College of Medicine in Washington, DC, Dr. Woodward returned to her native state, North Carolina, to complete residency training. During this time, she was actively involved in research, participated in national conferences, and served as a Chief Resident. In April 2011, she was awarded a College of American Pathologists (CAP) travel grant, which gave her the opportunity to complete a one-month, advanced elective in Hematopathology and Molecular Pathology at Genzyme Genetics of New York.


Dr. Paul Kirshman is a nationally recognized Uropathologist who provides clinical and anatomical Uropathology Consultation with a focus on prostate and bladder pathology. Dr. Kirshman has over two decades of experience and interest in prostate cancer and bladder cancer. He received his MD from the University of Montpellier, France and received his residency training at Westchester County Medical Center, Valhalla, New York. He then received fellowship training in Molecular Pathology under Dr. Mark Sobel at the National Institute of Health (NIH) in Bethesda, Maryland.


Dr. William Nguyen is a Uropathologist and Cytopathologist at Sterling Pathology National Laboratories. In addition to his time at Sterling Pathology, Dr. Nguyen works as an Associate Pathologist at the Corona Regional Medical Center. He has over 29 years of Pathology experience working at a variety of institutions including Presbyterian Intercommunity Hospital, Magnolia Clinic, Santa Ana Hospital Medical Center, and Fountain Valley Regional Hospital Medical Center.


Dr. Shitabata is board certified in Dermatopathology, Clinical and Anatomical Pathology. Dr. Shitabata has been practicing Dermatopathologysince 1994.He currently serves as the Director of Dermatopathology for the Dermatology Residency Program for the Harbor-UCLA Medical Center. He is a Clinical Associate Professor of Medicine and Pathology at UCLA-David Geffen School of Medicine, a Clinical Professor of Pathology at the Western University of Health Sciences College of Osteopathic Medicine, and an Adjunct Professor of Pathology and Dermatology at Touro University School of Osteopathic Medicine. Dr. Shitabata is also the President and Medical Director of the Dermatopathology Institute.