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Featured Services

•  Hematopathology Services
•  Dermatopathology Services
•  Women’s Healthcare Services
•  Neuropathology Services
•  Anatomic Pathology
•  Clinical Pathology
•  Histology Services
•  Fine Needle Aspiration Biopsy Services

Client Tools

•  Unlabeled Specimens


Diagnostic Pathology Medical Group’s team of Board certified dermatopathologists, Dr. Robert Ghiselli, Dr. Briana Gleason, Dr. David Guillen, Dr. Derek Marsee and Dr. Shayesteh Pashaei actively participate in clinical dermatological organizations and provide consultative services to dermatologists, primary care physicians and surgeons.

Our dermatopathologists have subspecialty expertise in common and uncommon skin disorders, including pigmented lesions, inflammatory dermatoses, skin cancers, precancerous keratoses and cutaneous lymphoproliferative disorders. The broad expertise among our dermatopathologists provides you with consistently high quality diagnostic consultations.

  • All skin biopsies are interpreted by a Dermatopathologist
  • Tissue and slide processing is performed on-site.
  • Rapid report turn-around – 24 hours for routine cases.
  • Web accessible diagnostic reports and photomicrographs.
  • Special stains, including a large inventory of histochemical and immunohistochemical and immunoflourescence studies.
  • Clinicopathologic correlation
Our dermatopathologists welcome the opportunity to assist you with any questions you may have, including the appropriate handling of your specimens.


Robert W. Ghiselli, M.D.
Dr. Ghiselli joined DPMG in 1991. He obtained his medical degree from the University of Illinois and completed his residency in Anatomic Pathology at Washington University Medical Center, St. Louis, MO. He also completed fellowships in Anatomic Pathology and Dermatopathology at Washington University Medical Center and Massachusetts General Hospital, respectively. Dr. Ghiselli is Board certified in Anatomic Pathology and Dermatopathology.



Briana Gleason, M.D.
Dr. Gleason joined DPMG in 2009. She received her medical degree from Northwestern University and completed her residency in Anatomic Pathology as well as a Fellowship in Soft Tissue Pathology at the Brigham and Women’s Hospital in Boston, Massachusetts. Dr. Gleason also completed a Fellowship in Dermatopathology at the University of Arkansas for Medical Sciences. Dr. Gleason is Board certified in Anatomic pathology and Dermatopathology.



David R. Guillen, M.D.
Dr. Guillen joined DPMG in 2004. He obtained his medical degree from State University of New York, at Buffalo. Dr. Guillen completed two years of general surgery residency followed by full residency training in Anatomic and Clinical Pathology, and fellowships in Surgical Pathology and Dermatopathology, at the University of Texas Southwestern Medical Center in Dallas, TX. Dr. Guillen is Board certified in Anatomic and Clinical Pathology, as well as Dermatopathology. Prior to joining DPMG, Dr. Guillen practiced dermatopathology with Cockerell & Associates Dermpath Diagnostics in Dallas, Texas



Derek K. Marsee, M.D., Ph.D.
Dr. Marsee joined DPMG in 2010. He received his medical and graduate degrees from the Ohio State University. Dr. Marsee completed his residency in Anatomic Pathology and a fellowship in Hematopathology at the Brigham and Women's Hospital in Boston, Massachusetts, as well as a fellowship in Dermatopathology in the Combined Harvard Dermatopathology Program (Beth Israel Deaconess Medical Center, Brigham and Women's Hospital, and Massachusetts General Hospital). Dr. Marsee is Board certified in Anatomic Pathology, Hematopathology, and Dermatopathology.



Shayesteh Pashaei, M.D.
Dr. Pashaei joined DPMG in 2007. She obtained her medical degree from Claude Bernard University in Lyon, France. She completed her residency in Anatomic and Clinical Pathology at the University of Colorado Health Sciences Center in Denver, Colorado; and a two-year fellowship in Dermatopathology at the University of Arkansas for Medical Sciences, Little Rock. Dr. Pashaei is Board-certified in Anatomic and Clinical pathology, as well as Dermatopathology.
Superior Information Technology

DPMG’s information system interfaces with several acute care hospitals, making the review and correlation of inpatient and outpatient pathology findings both timely and convenient.

DPMG clients may view their patient’s pathology reports and diagnostic images by accessing our secure, password-protected web site.

Sutter Medical Foundation physicians may also access their patients' pathology reports via the EpicCare, EpicWeb and Shipper information systems.

DPMG pathology reports for Quest Diagnostics clients can be accessed either through the DPMG web site or through the Quest Diagnostics Results On-Line portal.

Please contact your Client Liaison, or call our Customer Service Department at (916) 446-0424 to setup your unique password.
Telephone 916-446-0424 • Fax 916-446-5627 • 3301 C Street, Suite 200E, Sacramento, CA 95816
General Information: marketing@dpmginc.com  Customer Support: support@dpmginc.com