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What is Hematology?

If your doctor diagnoses you with a blood disorder, you may encounter the term “hematology.” But what is this field of medicine, exactly? And what do hematologists diagnose?

Hematology Tucson

Hematology Definition

Hematology is the study and treatment of disorders that affect the blood, bone marrow and lymphatic systems. Physicians who specialize in hematology are called hematologists. They regularly work with patients who have hematological diseases. However, they can also perform a variety of lab work, such as checking bone marrow samples and blood films under the microscope. In some cases, they may manage medical facilities and not interact with patients directly. 

What Can a Hematologist Diagnose?

Cochise Oncology’s hematologists can diagnose a vast array of conditions, including:

  • Sepsis – a systemic infection in the blood that can result from a localised infection (for instance a wound or a tooth abscess)
  • Hemophilia – a genetic condition where the blood has a greater tendency to clot
  • Sickle cell disease – a condition in which red blood cells do not form correctly
  • Cancers of the blood, bone marrow and lymph nodes
  • Deep vein thrombosis – a condition in which blood clots inside veins deep in the body, usually the legs
  • Anemia – a condition in which a patient has a naturally low red blood cell count

In most cases, hematologists will take blood samples and evaluate them in a laboratory to diagnose your condition. A complete blood count, for instance, lets them identify and monitor disease. Usually, they will take a sample from a vein or the tip of your finger and then check for levels of various blood cells and platelets. Sometimes, they will check your prothrombin time – a measure of how long it takes your body to form a clot in response to a pin prick. And they may also perform blood transfusions to replace lost blood after surgery or apply chemotherapy for various fast-growing cancer cells


Simply fill out the form on this page to request an appointment and one of our knowledgable team members will reach out to you. Or call our Sierra Vista oncology center to schedule directly at (520) 803-6644.

When to Seek a Hematologist’s Help

Usually, a general practitioner will refer you to a hematologist for further study if they suspect that you might have one of the conditions listed above. However, in some cases, you might have symptoms that warrant further investigation by a hematologist independently. 

If you are experiencing unexplained episodes of weakness, dizziness, fatigue or shortness of breath, or you have pale, yellowed skin, you may have anemia. This condition occurs when you do not have enough red blood cells, or when your red blood cells malfunction, and can’t carry sufficient oxygen around your body. 

You may also need to seek a hematologist’s help if you have blood cancer. These typically arise in the bone marrow – an area the body uses to create multiple types of blood cells. Leukemia, for instance, is a cancer that leads to abnormal white blood cells, incapable of effectively fighting disease. Lymphoma is another type of cancer that disrupts the lymphatic system’s ability to drain the body of fluid, impeding your ability to fight infection. 

Hematologists have the necessary expertise to identify these diseases and provide a suitable course of treatment.  


*Individual Results May Vary


At Cochise Oncology, we know optimal cancer treatment places the patient first – and our patients experience this every day. Read what our satisfied patients are saying about their experiences at Cochise Oncology.

Take the Next Step

Are you ready to learn more about hematology? Reach out to Cochise Oncology at (520) 803-6644 or fill out the consultation form on this page. We look forward to meeting you!

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