Physician Photo

Abner Louissaint, Jr., MD, PhD

Assistant in Pathology, Massachusetts General Hospital

Assistant Professor of Pathology, Harvard Medical School

Dr. Louissaint is an autopsy and hematopathology specialist. As an educator, he leads surgical grossing case discussions, and develops curriculum for the Pathology Residency Program at Massachusetts General Hospital.

Department of Pathology


  • Cancer Center
  • Lymphoma
  • Leukemia
  • Bone Marrow Transplant
Clinical Interests
Autopsy Pathology
Boston: Massachusetts General Hospital
Medical Education
MD, PhD, Weill Cornell College of Medicine
Residency, Massachusetts General Hospital
Fellowship, Massachusetts General Hospital
Board Certifications
Anatomic Pathology & Clinical Pathology, American Board of Pathology
Hematology, American Board of Pathology
Patient Age Group
Accepting New Patients
Accepting New Patients


Dr. Louissaint's clinical and research interests focus on hematopathology and on the molecular characterization of hematological malignancies.

Dr. Louissaint also has an interest in the development of novel approaches and programs for improving pathology graduate medical education. Current work includes the utility of digital imaging and development of web-based applications to enhance the teaching of autopsy and surgical gross pathology.



As a surgical pathologist with a particular interest in hematopathology, my current research is focused on the molecular characterization of particular disease entities, for the purposes of both classification and prediction of prognosis and susceptibility to treatment.  I am currently working on two lines of investigation: 1)Characterization of follicular lymphoma with a special focus on pediatric follicular lymphomas and t(14;18) negative follicular lymphomas. 2) Molecular characterization of thymomas and thymic carcinomas.

Pathology Associates
55 Fruit Street
Boston, MA 02114-2696

Phone: 617-643-9727
Fax: 617-726-6832