What Are the Symptoms of Blood Cancer (Leukemia and Lymphoma)?

The symptoms of blood cancer often present as persistent fatigue, unexplained bruising, night sweats, and painless swelling in the lymph nodes. Thanks to promising next-generation smart drugs and cellular therapies that frequently make the headlines today, significant success is being achieved in managing these conditions. Early diagnosis is the most critical step in increasing treatment success and improving the patient's quality of life. Correctly reading the early signals your body sends and consulting a specialist in time is the foundation of safeguarding your health.

• Blood cancers are primarily divided into three main types: leukemia, lymphoma, and multiple myeloma.
• Persistent weakness, unexplained fever, and excessive night sweats are the most common early warnings.
• Early diagnosis greatly increases the success of new targeted therapies.
• Painless, growing lumps in the neck, armpits, or groin may raise suspicion of lymphoma.
• Tests such as a complete blood count, peripheral smear, and bone marrow biopsy are performed for a definitive diagnosis.

What is Blood Cancer (Leukemia and Lymphoma)?

Known in medical terms as hematologic cancers, blood cancers are malignant diseases that begin in the bone marrow, where blood cells are produced, or in the lymphatic system, a vital part of the immune system. In a healthy body, blood cells are produced as needed and naturally die off after completing a specific lifespan. However, in blood cancers, this cellular cycle is disrupted. Abnormal and dysfunctional cells multiply uncontrollably, replacing healthy blood cells.

To answer the frequently asked question, "what is leukemia?": it is the cancerization of white blood cells produced in the bone marrow. These abnormal cells multiply rapidly, enter the bloodstream, and fail to perform their duty of fighting infections. Lymphoma, on the other hand, occurs when lymphocytes—the building blocks of the immune system—mutate and form tumor masses in the lymph nodes, spleen, thymus gland, or bone marrow. Both types of disease can affect children and adults alike; however, their incidence rates vary among age groups depending on their specific subtypes.

Causes and Risk Factors

Although the exact cause of blood cancer cannot be clearly identified in every patient, it is known that mutations in the DNA structure of cells initiate this process. These mutations cause cells to divide faster than normal and survive when they should naturally die. Various environmental and genetic factors have been proven to increase the risk of these mutations.

Exposure to high doses of radiation, prolonged contact with certain industrial chemicals like benzene, and previous chemotherapy or radiotherapy treatments for another type of cancer are among the significant risk factors. While certain genetic conditions like Down syndrome increase the risk of leukemia, the use of immunosuppressive drugs or specific viral infections such as HIV and Epstein-Barr virus (EBV) can elevate the risk of lymphoma. Having a family history of blood cancer slightly increases the risk, but most of these diseases develop through genetic changes that occur later in life, without a direct hereditary link.

What Are the Symptoms of Blood Cancer?

Blood cancer symptoms vary depending on the type of disease, its progression rate, and the patient's general health. In acute leukemias, symptoms appear suddenly and worsen rapidly, whereas in chronic leukemias or slow-growing lymphomas, complaints can progress insidiously over months. The most common general symptoms include extreme fatigue that does not improve with rest, rapid and unintentional weight loss, unexplained fever, and severe night sweats, especially heavy enough to require changing clothes during the night.

Leukemia-specific findings generally stem from a decrease in healthy blood cells. Due to low platelet counts, unexplained bruising on the skin, bleeding from the gums or nose, and tiny red spots under the skin (petechiae) may occur. Severe bone and joint pain can be experienced as the bone marrow fills with cancerous cells. Lymphoma symptoms, on the other hand, are mostly painless and progressively growing lymph node swellings that appear in the neck, armpit, or groin areas. To learn more about the nature of these swellings, you can read our article titled When Are Swellings and Masses in the Body a Sign of Cancer?. Additionally, rare but specific signs such as severe skin itching and pain in the lymph nodes after consuming alcohol can also be seen in lymphoma.

How Is It Diagnosed at the Hospital?

When you visit the hospital with a suspicion of blood cancer, your specialist will first take a detailed medical history and perform a physical examination. During the physical exam, enlarged lymph nodes, liver, or spleen size are carefully checked. The first step of diagnosis is usually a complete blood count (CBC) test. This test shows the number of red blood cells, white blood cells, and platelets. If abnormal values are detected, a peripheral smear test is performed, where blood cells are examined under a microscope.

To make a definitive diagnosis and determine the subtype of the disease, bone marrow aspiration and biopsy are the gold standard. This procedure is usually performed under local anesthesia by taking a fluid and tissue sample from the pelvic bone with a special needle. In cases of suspected lymphoma, surgical removal of the enlarged lymph node (excisional biopsy) is required; needle biopsies are generally insufficient for diagnosing lymphoma. Advanced imaging methods such as PET/CT (Positron Emission Tomography), computed tomography (CT), or ultrasonography are also utilized to determine the spread (stage) of the disease in the body.

Treatment Processes and Recovery

Treatment for blood cancers is personalized according to the type, stage, and genetic characteristics of the disease, as well as the patient's age. Traditional chemotherapy remains one of the most frequently used methods to kill cancer cells. However, smart drugs (targeted therapies), which have been making headlines in recent years, make treatment possible without harming healthy cells by targeting only specific genetic mutations in cancer cells. Immunotherapy methods, which train the immune system to fight cancer, have also revolutionized the treatment of lymphoma and leukemia.

In high-risk or recurrent cases, a bone marrow (stem cell) transplant is a life-saving option. The treatment process generally takes months and may include intensive periods requiring hospitalization. During the home care process, protecting against infections is of vital importance. Because the immune system is weakened, it is necessary to avoid crowded environments, pay utmost attention to personal hygiene, and consume well-cooked, safe foods. The recovery process requires patience, but with the new possibilities offered by modern medicine, complete healing (cure) rates are steadily increasing.

Complications and Risk Groups

Blood cancers and the intensive treatments applied can pave the way for various complications. The most serious complication is severe infections developing due to an insufficiency of white blood cells (neutropenia). Even a simple cold can be life-threatening for an immunosuppressed patient. Due to low platelet counts, dangerous internal bleeding can occur in the gastrointestinal tract or the brain. Furthermore, tumor lysis syndrome—which occurs when cancer cells rapidly broken down by chemotherapy drugs enter the bloodstream—is a medical emergency that can lead to kidney failure.

Elderly individuals, those with chronic heart, lung, or kidney diseases, and people who already have a weakened immune system are in the highest risk group for blood cancer complications. The treatment processes for these patients require more precise dose adjustments and close monitoring to minimize side effects. In the post-treatment period, regular doctor check-ups should not be neglected regarding the risk of developing secondary cancers or long-term complications such as weakening of the heart muscle.

When to See a Doctor?

Closely monitoring changes in your body and reporting unusual situations to a doctor without delay is of great importance. If you notice fatigue that lasts longer than two weeks and does not improve with rest, swellings in the neck, armpits, or groin that do not shrink for weeks and remain painless, unexplained weight loss, and severe night sweats, you should definitely consult a healthcare facility. While these symptoms do not always mean cancer, the underlying cause must be clarified.

Some situations require immediate medical intervention. If you experience any of the following symptoms, you should go to the nearest emergency room or call 112 immediately:

• High fever (38.3°C and above) that suddenly appears and does not drop, whether you are receiving chemotherapy or at any other time.
• Uncontrollable nosebleeds, vomiting blood, or seeing blood in your stool.
• Suddenly developing severe shortness of breath and chest pain.
• Confusion, severe headache, or feeling faint.

The Process at BHT CLINIC

At our hospital, the diagnosis and treatment of hematological diseases are meticulously carried out by our expert physicians and our laboratory infrastructure equipped with advanced technology. Patients who present with suspicious findings undergo a detailed evaluation in our Hematology department. Necessary procedures such as blood tests, peripheral smears, and bone marrow biopsies are performed quickly and safely under the same roof. Once the diagnosis is confirmed, a personalized treatment plan is created by a multidisciplinary council that includes oncology, pathology, and radiology specialists.

Our 24/7 emergency department and intensive care units are always ready for acute complications such as infections or bleeding that may develop during the treatment process. Bringing your past blood test results, imaging CDs, and a current list of your medications with you to your first examination will speed up the process. Knowing that early diagnosis saves lives, you can trust our expert staff to safeguard your health.

Frequently Asked Questions

Can leukemia be completely cured?

Yes, depending on the type of leukemia, the patient's age, and genetic characteristics, a complete recovery (cure) can be achieved. Complete recovery rates are particularly high in childhood leukemias and certain adult leukemia types where targeted smart drugs are used.

Is lymphoma contagious?

No, blood cancers like lymphoma or leukemia are absolutely not contagious. These diseases do not spread from person to person through respiration, physical contact, or blood; they emerge entirely as a result of genetic mutations in the person's own cells.

Is blood cancer genetic?

The vast majority of blood cancers are not hereditary (passed down through families); they develop through genetic mutations caused by lifelong environmental factors or random cell division errors. However, having a family history of blood cancer can statistically increase the risk slightly.

Is every swollen lymph node cancer?

No, lymph nodes are the body's filters that fight infections, and they can swell due to simple reasons like a cold or a dental infection. However, if the swelling is painless, does not go away for weeks, grows progressively, and is accompanied by fever or night sweats, it must be investigated.

Can leukemia be detected in a blood test?

Abnormally high or low white blood cells, anemia, and low platelets in a simple complete blood count (CBC) test raise the suspicion of leukemia. However, a definitive diagnosis is made not only by a blood test but alongside a peripheral smear and a bone marrow biopsy.

To resolve your doubts about your health and benefit from early diagnosis opportunities, you can easily schedule a consultation with our expert physicians through our appointment page.

This article is for informational purposes only; please be sure to consult your physician for diagnosis and treatment.