Immunohistochemistry (IHC) and In Situ Hybridization (ISH)

IHC antibody optimization

Method Development

Experimental Design

Gross Specimen Examination

Processing, Embedding and Microtomy

Flow Cytometry

Diagnostic Consultations

Breast Pathology



Gastrointestinal and Liver Pathology

General Surgical Pathology

Gynecological Pathology

Medical Directorships

Clinical Pathology

A Few Partners

Peninsula Pathologists is passionate, friendly, and professional, and has gone the extra mile in all of our research collaborations. Not only are they timely and very communicative, but they spend the time to understand our project and work to give us the best deliverables possible.

Nickolas Attanasio, Senior Scientist & IHC Core Lead at ArsenalBio

Reference Lab

South San Francisco-based CRO delivering high quality, quick and accurate professional and technical services results.


Customized to the specific science needs, accelerate progress through collaboration with leaders in pathology.


Quick, accurate diagnoses with an understanding of current standards of care.