Hematology Program

Comprehensive Care for Children with Benign Blood Disorders

Our Boston hematology experts provide evaluation, consultation, treatment and education services for children with benign blood disorders. We are able to coordinate every aspect of care for these children by working in a multidisciplinary team with well-trained experts including those from neurology, nephrology, orthopedics, CCSN, cardiology and ophthalmology.

The hematology team provides exceptional care for a number of benign blood disorders, including:

Red Blood Cell Disoders

Coagulation Issues

  • Hemophilia
  • Von Willebrand disease
  • Rare factor deficiencies
  • Prothrombotic disorders

Platelet Disorders

  • Thrombocytopenia 
    • Congenital
    • ITP (Idiopathic Thrombocytopenic Purpura)
  • Thrombocytopathies

White Cell Disorders

  • Neutropenia
  • Leukocytosis

Treatment Services

Hematology Clinic at Floating Hospital for Children in Boston, MA.We provide personalized treatment plans for each of our patients that include strategies for minimizing symptoms and maintaining long-term health. Treatment options may include:

Oral or injected medications to prevent complications and manage symptoms.

Transfusion therapy – Our pediatric/hematology laboratory offers a full array of testing and is staffed by a technologist expert in phlebotomy of the smallest patients. In conjunction with the Medical Center’s Blood Bank, the Division’s physicians are skilled in the evaluation and management of pediatric patients, performing aggressive pheresis (whole blood exchange) in children as small as 10 kilograms.

Blood and Marrow Transplantation (BMT) – We provide options for treating hematologic disorders with bone marrow, cord blood and peripheral blood stem cell transplantation. Our state-of-the-art Neely Pediatric BMT Unit offers sophisticated services for patients and comfortable accommodations for family members.


In caring for children with blood disorders it is important that we provide education for the patient’s family and school. We work with our patients’ families to review possible genetic dispositions and treatment options. Our social worker and Child Life specialists also provide information on how a particular disorder may affect our patients’ day-to-day life by visiting the schools in the community and working with the staff.

If you are looking for more information on a specific disease or disorder, please use the links below:


Hannah Fassel, MD

Hannah Fassel, MD

Accepting New Patients

Title(s): Hematologist/Oncologist; Assistant Professor, Tufts University School of Medicine
Department(s): Pediatrics, Hematology/Oncology
Appt. Phone: 617-636-5535
Fax #: 617-636-7738

Anemia, bleeding disorders, thrombosis, general hematology, and childhood cancers such as leukemia and lymphoma.

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Cathy G. Rosenfield, MD

Cathy G. Rosenfield, MD

Accepting New Patients

Title(s): Co-Director, Tufts University School of Medicine Hematology Course; Associate Clinical Professor, Tufts University School of Medicine
Department(s): Pediatrics, Pediatric Hematology/Oncology
Appt. Phone: 617-636-5535
Fax #: 617-636-7738

Hemophilia and other bleeding disorders, prothrombotic disorders, sickle cell and other hemoglobinopathies, general hematology

View Full Profile for Cathy G. Rosenfield, MD

Call us today to find out more information about your child’s blood disorder, to schedule a consultation or to make an appointment. Our phone number is 617-636-5535 and our fax number is 617-636-7738.