Low iron (iron deficiency) isn't a direct cause of most cancers, but unexplained iron deficiency anemia (IDA) can be a significant warning sign or symptom of underlying cancers, especially gastrointestinal cancers (colon, stomach, esophageal) and some blood cancers (leukemia, lymphoma, myeloma), due to blood loss or impaired production; iron is vital for cancer cell growth, so deficiencies can also affect tumor development in some cases, particularly in the GI tract.
As a result, patients with leukemia often experience low hemoglobin levels. Additionally, leukemia cells use a lot of iron to support their rapid growth, which can lead to iron deficiency. Lymphoma Lymphoma, which includes both Hodgkin lymphoma and non-Hodgkin lymphoma, is a cancer that starts in the lymphatic system.
Indeed, the highest percentage of anemic patients is reported in lung, gynecologic or genitourinary, and gastrointestinal cancers [8,9,10].
Bypassing or removing intestinal tissues that help take in iron and other nutrients raises the risk of iron deficiency anemia. People who have certain conditions that affect digestion. These include celiac disease, bowel diseases such as ulcerative colitis and Crohn's disease, kidney disease, and peptic ulcers.
Most anemia is benign, but persistent, unexplained anemia—especially with weight loss or GI bleeding—can precede a cancer diagnosis and needs evaluation.
Symptoms
In this study, the overall prevalence of cancer in anemia patients was 5.6% (25.0%, men; 3.3%, women). This means that compared with the whole population, more anemia patients were diagnosed with cancer. Cancer is typically accompanied by anemia.
Heart and lung problems
For example, you may develop tachycardia, which is an abnormally fast heartbeat, or heart failure, where the heart fails to pump enough blood around your body at the right pressure.
Leukemia can interfere with the production of red blood cells in the bone marrow, resulting in anemia. Over time, anemia can lower iron levels, especially if there is chronic blood loss or poor iron absorption. However, leukemia does not directly cause low iron.
Iron is depleted by blood loss (heavy periods, bleeding ulcers, surgery), increased demand (pregnancy, growth spurts, intense exercise), poor dietary intake, and conditions that hinder iron absorption (celiac disease, gastric bypass, some medications, or certain foods/drinks like tea/coffee/dairy with meals). Exercise can cause loss through sweating, red blood cell damage (hemolysis), and increased needs, while poor absorption is a major factor, even with good intake.
Early signs of myeloma often include vague symptoms like persistent fatigue, bone pain (back, hips, ribs), frequent infections, unexplained bruising or bleeding, shortness of breath, and kidney issues (like frequent urination), though it can be asymptomatic early on and found in routine blood tests, leading to symptoms like thirst, confusion (from high calcium), or weakness. Because these symptoms can mimic other conditions, seeing a doctor for ongoing issues is crucial for proper diagnosis.
If left untreated, anemia can cause multi-organ failure. This can include high output heart failure, angina, arrhythmias, cognitive impairment, and renal failure, among others.
Anaemia is a shortage of red blood cells or haemoglobin in your blood. It can develop as an effect of lymphoma, or as a side effect of treatment. Anaemia can cause tiredness, weakness, or shortness of breath.
So far, researchers know that too much iron can produce free radicals and reactive oxygen species that can damage DNA, potentially leading to cancer-causing mutations. Iron plays a critical role in the formation of nucleotides that are used to replicate DNA, and it can also activate the cancer driver protein HIF2α.
Common leukemia signs and symptoms include:
Studies have suggested that ferritin might be used as a diagnostic and prognostic biomarker for various malignancies. Studies have also shown that ferritin can discriminate cancer patients, even during early-stage disease, and therefore might be a valuable biomarker and diagnostic marker [13, 15, 16, 17].
Leukemia symptoms commonly include:
Advanced Study
Stage 1 – A patient has high levels of white blood cells and enlarged lymph nodes. Stage 2 – A patient has high levels of white blood cells and is anemic. He or she may also have enlarged lymph nodes. Stage 3 – A patient has high levels of white blood cells and is anemic.
Iron deficiency is not just a blood disorder; it actually affects the brain and body directly and often disrupts sleep. Recognizing its relationship to RLS, insomnia, and restlessness at night in kids and the elderly can lead to earlier diagnosis, better treatment, and better nights of sleep.
Iron deficiency anaemia. Iron deficiency anaemia is caused by lack of iron, often because of blood loss or pregnancy. It's treated with iron tablets and by eating iron-rich foods.
Iron levels in the body are largely controlled by activity in two key organs: the gut, where we absorb iron from our diet, and the spleen, where we recycle red blood cells. The hormone hepcidin controls the availability of iron in the blood stream by inhibiting the iron exporter ferroportin in the gut and spleen.
Some types of cancer can directly lead to anemia, regardless of treatment. They include: Bone marrow cancers. Rooted in the bone marrow, such as multiple myeloma, lymphoma and leukemia, these are closely associated with anemia.
About 90% of cancers are caused by environmental and lifestyle factors, not genetics, including smoking, poor diet (red meat, fried foods), alcohol, sun exposure, pollutants, infections, obesity, and inactivity; only 5–10% are due to inherited genetic defects, with most cancers arising from lifestyle-induced genetic mutations. Tobacco alone accounts for about a third of cancer deaths, while diet, obesity, and inactivity contribute significantly, with controllable factors being key to prevention.
When cancer is suspected there is a fast route within the NHS to get further tests and specialist advice to rule out cancer. These are called 2 week wait referrals and you should be seen within 2 weeks of being referred.