Pathology Laboratories


Our immunohistochemistry laboratory includes three high-volume automated immunostainers using highly advanced epitope retrieval techniques.  We offer complete immunohistochemistry characterization of surgical and cytologic specimens, including estrogen and progesterone receptors and over 100 other monoclonal and polyclonal antibodies. Each year, our hematopathology laboratory performs cytochemistry on more than 1,000 cases of acute leukemia and processes thousands of bone marrow specimens annually.

Flow Cytometry

Our flow cytometry laboratory uses high-capacity instruments to analyze thousands of samples annually to measure a variety of parameters, including cell surface antigens. The presence or absence of certain cell surface antigens has shown great prognostic value in various neoplasia, where treatment protocols can be optimized by customizing the type of treatment based on the types of cell surface antigens present. We provide comprehensive cytochemical and immunophenotypic characterization of leukemias and lymphomas; B and T cell subset analysis for immunodeficiencies; stem cell counts; solid tumor DNA content and cell cycle analysis.


Every year, the cytogenetics laboratory processes a heavy volume of neoplastic specimens, utilizing both conventional cytogenetics as well as fluorescence in situ hybridization (FISH). FISH has become the recognized gold standard in determining the likely course of disease and appropriate treatment in leukemias such as chronic lymphocytic.

Molecular Biology

Our molecular biology laboratory performs Southern blot hybridization, polymerase chain reaction, and in situ hybridization studies for B and T cell gene rearrangements, many different chromosomal translocations for lymphoma and leukemia, including t(14;18), t(9;22), t(15;17), and Epstein-Barr virus. Many of the molecular tests can be performed on paraffin-embedded tissue.

Laboratory accreditation, certification and licensing

The Consultation Services Laboratories at City of Hope are fully accredited by the College of American Pathologists (CAP #22900-01), certified under the Clinical Laboratory Improvements Amendments of 1988 (CLIA '88, ID No. 05D0665695) and licensed by the state of California (CLF 268).

The laboratories participate in the CAP's external proficiency survey program for flow cytometry, immunophenotyping, immunohistochemistry, cytogenetics and molecular oncology. Specific details on our survey performance are available upon request.