Marcia Edelweiss, MD

About Me

I am a board-certified pathologist and cytopathologist on the Surgical Pathology Diagnostic Service with a special interest in breast disease and general cytology.

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As a breast pathologist, I analyze breast tissue biopsies and surgical specimens to identify signs and characteristics of disease, and make determinations about diagnoses that help guide treatment decisions for our patients.

As a cytologist, I analyze cells and fluid samples from various organs to help make diagnoses. I also perform biopsies in which I use a thin needle to remove cells or fluid from nodules that you can feel through the skin, a procedure called “fine needle aspiration.” This minimally invasive technique enables us to make an accurate diagnosis with relatively few cells and less risk for complications.

I look forward to continuing my scholarly contributions to the field of breast pathology and cytopathology in the coming years, and am honored to serve as medical director of Memorial Sloan Kettering’s School of Cytotechnology. Through this one-year training program we provide students with a range of skills, including the expertise to process and microscopically evaluate specimens using state-of-the-art technologies.

After fellowships at MD Anderson Cancer Center and Memorial Sloan Kettering, I joined the faculty of Memorial Sloan Kettering in 2010. I am a native of Brazil and am fluent in Portuguese and Spanish as well as English.

  • Clinical Expertise: Breast Pathology; Surgical Pathology; Cytopathology
  • Languages Spoken: English; Spanish
  • Education: MD, Universidade Federal do Rio Grande do Sul Medical School (Porto Alegre, Brazil)
  • Residencies: SUNY Downstate Medical Center
  • Fellowships: The University of Texas MD Anderson Cancer Center; Memorial Sloan Kettering Cancer Center
  • Board Certifications: Anatomic Pathology; Cytopathology


Visit PubMed for a full listing of Marcia Edelweiss’ journal articles

Pubmed is an online index of biomedical articles maintained by the U.S. National Library of Medicine and the National Institutes of Health.

Clinical Trials

As home to one of the world’s top cancer research centers, Memorial Sloan Kettering is typically involved in more than 900 clinical trials at a given time. Currently, clinical trials focused on the conditions I treat are enrolling new patients. If you’re interested in joining a clinical trial, click to learn about the trial’s purpose, eligibility criteria, and how to get more information.

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Most major health insurers offer plans that include MSK as one of their in-network providers. If MSK is in-network, it means all our doctors are too. Medicaid and New York State Medicare also provide benefits for care at MSK.

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