Hematology Oncology: The Battle Against Blood Disorders and Cancer

 By: Dhyan Patel

Hematology Oncology

Note: This article is part of a student-run educational series on medical specialties, based on research and/or shadowing (in person or virtual), in order to educate other students who are interested in healthcare careers and may lack the ability to shadow specialists in their areas.

Background

Hematology oncology refers to the specialty of doctors who are devoted to diagnose and treat blood disorders and cancers. These doctors work through some of the most challenging patients with their expertise and care to help give patients hope through their hard battle.


Hematology oncology is a type of dual specialty that combines two medical fields: hematology, which is the study of blood and its disease, and oncology, which is the study and treatment of cancer. These two subspecialties refer to working with some of the most difficult diseases that lead deaths in the world, and this is hematology oncology represents one of the most impactful areas in medicine.

So, what do they do?

Hematologist oncologists diagnose and treat a wide range of conditions that affect the blood, bone marrow, and the lymphatic system (network or organs that help fight infections and maintain fluid levels in the body). These can include various cancers such as leukemia, blood disorders such as hemophilia, bone marrow diseases such as aplastic anemia, and more. 


Their work often involves interpreting lab test data, reviewing imaging scans, and performing bone marrow biopsies to determine what is happening at the cellular level. Once their diagnosis is made, they design treatment plans that include chemotherapy, targeted therapy, stem cell transplants, or other methods. 


Hematology oncologists also often form close relationships with their patients through their treatment plans. This is primarily due to the fact that cancer treatment can range from months or years, and these doctors support and guide their patients through every step of their journey.

Additional Information

Hematology oncology often refers to understanding of the cells that circulate through our veins and defend our bodies. These cells are some of the most important parts of our bodies that function in order to protect us. If these cells begin to change and lose their functions, then the body’s overall function can be disrupted.


These doctors need to understand hematology on a deeper level and need to focus on how blood is made and how it functions. Our blood carries oxygen, fights infections, and helps wounds heal. When something goes wrong such as us having a deficiency in red cells, it can disrupt the body’s entire balance.


Oncology takes a look at how cells grow uncontrollably. Cancer occurs when genetic mutations cause cells to divide without stopping, and this causes tumors or other tissues to form. Hematology oncologists must understand the science behind cancer and how to deal with it.

Required education and training

Similar to other medical careers, becoming a hematology oncologist requires several years of studying. They must spend four years to first earn their bachelor's that is typically done in a science related major. Then they must go through four years of medical school. After that they must complete a three-year internal medicine residency. After that they must complete a three-year fellowship in hematology oncology where they learn to diagnose and treat blood and cancer disorders while conducting research and working with patients. 

Importance

Due to the fact that cancer and blood disorders affect millions of people worldwide, hematology oncology is one of the most needed areas in the medical field. Each day patients are fighting for their lives, and hematology oncologists work with them to give them courage and the best possible chance at recovery. Due to their work, survival rates for many types of cancers have improved drastically. This is why they are one of the most important types of doctors.

References

Atlantic Health. (2025). Hematology and Oncology Fellowship Program. Atlantichealth.org. https://ahs.atlantichealth.org/professionals-medical-education/residencies-fellowships/hematology-oncology-fellowship.html

Bayhealth. (2025). Hematology-Oncology Explained | Bayhealth. Bayhealth.org. https://www.bayhealth.org/community-wellness/blog/2025/june/hematology-oncology-explained

Columbia. (2021, March 7). Hematology/Oncology | Vagelos College of Physicians and Surgeons. Vagelos College of Physicians and Surgeons. https://www.vagelos.columbia.edu/departments-centers/hematology-oncology

Medschoolcoach. (2021, September 20). Hematology-Oncology with Dr. Harvey Katzen - Virtual Pre-Med Education by MedSchoolCoach. Virtual Pre-Med Education by MedSchoolCoach. https://shadowing.medschoolcoach.com/lessons/hematology-oncology-with-dr-harvey-katzen

Scott, J. (2022, December 19). Hematologist Oncologists and What They Do. Verywell Health. https://www.verywellhealth.com/hematology-oncology-6890978

UF Health. (2025). Hematology and Oncology - UF Health. Ufhealth.org. https://ufhealth.org/specialties/hematology-and-oncology

WebMD Editorial Contributor. (2020, December 21). What Is a Hematologist Oncologist? WebMD. https://www.webmd.com/cancer/lymphoma/what-is-a-hematologist-oncologist

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