Pathologists 2018-05-30T18:50:19+00:00

Our Pathologists

Wayne Schultheis, M.D., FCAP
Medical Director, TOPA Diagnostics

Subspecialty Expertise: Fine needle aspiration and cytopathology, gastrointestinal pathology
Dr. Schultheis earned his M.D. from the University of Southern California and received training at Los Angeles County-USC Medical Center where he served as Chief Resident and Clinical Assistant Professor of Pathology. He was also Director of Cytology and Fine Needle Aspiration at USC-Norris Cancer Center. In addition to his position at TOPA Diagnostics, Dr. Schultheis is Chief of Pathology at Los Robles Hospital and Medical Center. Dr. Schultheis is board certified in Anatomic and Clinical Pathology. He has published several articles and given presentations at scientific associations on a variety of topics.
Edward Blackman, M.D., FCAP
Director of Molecular Microbiology

Subspecialty Expertise: Fine needle aspiration and cytopathology, gastrointestinal pathology, dermatopathology, molecular microbiology
Dr. Blackman earned his M.D. at the University of Health Sciences, Chicago Medical School, and received training at Cedars-Sinai Medical Center. Dr. Blackman has received multiple awards and honors, including the Leo G. Rigler award as Outstanding Resident from the Department of Pathology at Cedars-Sinai Medical Center. He has published numerous articles on several topics, predominantly in the field of gastrointestinal pathology, including ulcerative colitis, cryptosporidiosis, cytomegalovirus and duodenal neoplasia. His work has been presented at several national scientific organizations. He has also been a reviewer for the American Journal of Gastroenterology. Dr. Blackman is board certified in Anatomic and Clinical Pathology and in Cytopathology. He is on the medical staff at Los Robles Hospital and Medical Center.
Regina Singson, M.D., FCAP
Subspecialty Expertise: Gastrointestinal pathology
Dr. Singson earned her M.D. at the University of the Philippines College of Medicine and received training at Cedars-Sinai Medical Center where she served as Chief Resident in Pathology for two years. Dr. Singson has received several awards and honors, including the Leo G. Rigler award for Outstanding Resident at Cedars Sinai two consecutive years. Dr. Singson is board certified in Anatomic and Clinical Pathology and completed a fellowship in Surgical Pathology. Dr. Singson has a special interest and expertise in gastrointestinal pathology, which has resulted in the presentation of her work at national meetings of scientific organizations and the publication of several articles. She is on the medical staff at Los Robles Hospital and Medical Center.
Jianming (James) Yin, M.D., Ph.D., FCAP
Director of Hematopathology

Subspecialty Expertise: Hematopathology, head and neck pathology, soft tissue pathology
Dr. Yin earned his M.D. from Weifang Medical College and received training at Beijing Medical University in China. He also studied at the University of Kentucky, where he also earned his Ph.D. in Oncological Biochemistry. Dr. Yin has received many awards and honors, including the Donald West King award for outstanding performance in pathology training. Dr. Yin is board certified in Anatomic and Clinical Pathology and Hematopathology. He has published many articles on gene regulation in hematological and nonhematological neoplasms. He has presented his work at several national scientific meetings. Dr. Yin is on the medical staff at Los Robles Hospital and Medical Center.
Danielle Westfall, M.D., FCAP
Director of Urologic Pathology

Subspecialty Expertise: Urologic pathology, breast pathology
Dr. Westfall earned her M.D. from The Ohio State University College of Medicine & Public Health. She completed her pathology residency at Cedars-Sinai Medical Center, where she served as Chief Resident in Pathology. Dr. Westfall also completed a fellowship in genitourinary pathology at Cedars-Sinai Medical Center. Dr. Westfall was the recipient of the Nathan B. Friedman award for Outstanding Resident Research and earned a Foundation Grant from the College of American Pathologists (CAP) for the study of digital pathology. As a member of both state and national pathology organizations, she has served on several committees, and is currently on the Surgical Pathology Committee for the CAP and has been appointed as a California delegate to the CAP House of Delegates. Her publications cover a variety of topics, with a focus in genitourinary pathology, and include numerous peer-reviewed articles and book chapters. She has presented her research at several national scientific meetings. Dr. Westfall was awarded a Certificate of Recognition for completing the Multidisciplinary Breast Pathology Advanced Practical Pathology Program (MBP AP3). Dr. Westfall is board certified in Anatomic and Clinical Pathology and is on the medical staff at Los Robles Hospital and Medical Center.
Eric Broxham, M.D., FCAP
Director of Women’s Health Services

Subspecialty Expertise: Fine needle aspiration and cytopathology, women’s health pathology, hematopathology, molecular pathology
Dr. Eric Broxham received his M.D. from the University of Texas Southwestern at Dallas. He then underwent pathology residency training at Los Angeles County-USC Medical Center (LAC-USC). During this time he served as Chief resident. He then completed a surgical pathology fellowship at LAC-USC, where he received a ‘Most Outstanding Fellow’ award. He then completed a cytopathology fellowship at LAC-USC during which he served as co-chief fellow. Over the course of his training, he published many collaborative articles on a variety of topics. Dr. Broxham is board certified in Anatomic and Clinical Pathology as well as in Cytopathology. He is on the medical staff at Los Robles Hospital and Medical Center.
Cuauhtemoc Magana, M.D., FCAP
Subspecialty Expertise: Fine needle aspiration and cytopathology, hematopathology
Dr. Magana earned his M.D. from the Keck School of Medicine at the University of Southern California (USC). He completed his Anatomic and Clinical Pathology residency training at Los Angeles County-USC Medical Center (LAC-USC). He has completed cytopathology and a surgical pathology fellowships at LAC-USC, where he served as co-chief fellow and chief fellow, respectively. Dr. Magana is board certified in Anatomic and Clinical Pathology and Cytopathology. He is on the medical staff at Los Robles Hospital and Medical Center.

Joel Friedman, D.O.
Subspecialty Expertise: Urologic Pathology

Dr. Joel Friedman earned his D.O. degree at Western University of Health Sciences College of Osteopathic Medicine of the Pacific in Pomona, California. He subsequently completed an Anatomic and Clinical Pathology residency program at Los Angeles County+USC Medical Center (LAC+USC), where he served as co-chief resident. He then stayed at LAC+USC Medical Center to complete fellowship training in surgical pathology and then pursued a second fellowship in genitourinary pathology at the University of Michigan in Ann Arbor. During his time in Michigan he was involved in research on multiparametric prostate MRI-guided biopsies and on prostatic urethral cancers. He has presented his research at the annual national meeting of the United States and Canadian Academy of Pathology. Dr. Friedman is board certified in Anatomic and Clinical Pathology and is on the medical staff of Los Robles Hospital and Medical Center.

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