- helical computed tomography
- helical tomotherapy
- Helicobacter pylori
- helper T cell
- hemagglutinin-neuraminidase
- hemangiopericytoma
- hemangiosarcoma
- hematogenous
- hematologic cancer
- hematologist
- hematoma
- hematopoiesis
- hematopoietic growth factor
- hematopoietic tissue
- hematoporphyrin derivative
- hematuria
- heme
- hemihypertrophy
- hemilaryngectomy
- hemochromatosis
- hemoglobin
- hemophagocytic lymphohistiocytosis
- hemophilia
- hemoptysis
- hemorrhage