Physical Side Effects
Some cancer survivors experience long-term physical side effects as a result of the cancer and its treatments. Survivors should ask a doctor which side-effects to watch out for, based on the type of cancer they had and the treatments they received. It is common for survivors to worry that a symptom or side effect they experience means that the cancer has returned. However, these side effects are commonly experienced by cancer survivors, and do not necessarily mean the cancer has returned.
Fatigue
Some cancer survivors experience chronic fatigue. This fatigue may get better quickly or last long after treatment ends, depending on the type of cancer the patient had and the treatments they received.
Memory & Concentration
Chemotherapy can cause a side-effect commonly known as "chemobrain." Cancer survivors describe "chemobrain" as a "brain fog," and often have trouble concentrating, paying attention, or remembering things. "Chemobrain" usually goes away after treatment ends.
Peripheral Neuropathy
Peripheral neuropathy occurs when damage to the nervous system interferes with transmissions between the brain and the rest of the body. Common symptoms of peripheral neuropathy include tingling or pain in the hands or feet, burning, weakness, numbness, or sensitivity to hot or cold. This condition is usually irreversible after treatment ends.
Incontinence
Incontinence is urine leakage or the inability to control the flow of urine. Incontinence may be a problem if the prostate or bladder has been removed as part of cancer treatment. Talk to your doctor about treatments and procedures to manage this condition.
Early Menopause
Menopause is a period in every woman's life when she becomes infertile and stops having periods. Chemotherapy and hormone therapy medications can reduce the hormones in a woman's body and cause early menopause.
Diabetes
Steroid drugs can cause blood glucose levels to rise in some patients. These glucose levels may remain elevated after treatment ends and put these survivors at higher risk for diabetes.
Endocrine Changes
Some cancer treatments suppress the sex hormones that certain cancers need to grow and function. This may cause loss of libido, memory loss, muscle loss, anemia, depression, or weight gain. Talk to a doctor about the different ways to manage these symptoms.
Hypothyroidism
Some cancer survivors who have undergone radiation therapy to the head and neck region may develop hypothyroidism, a condition characterized by low levels of the thyroid hormone. This condition may cause weight gain, constipation, dry skin, and sensitivity to hot and cold. Talk to a doctor about ways to manage this condition.
Chronic Pain
Some cancer survivors may experience long-term pain. This pain may be a result of surgeries and other cancer treatments damaging nerves in the body. Talk to a doctor about medications and other ways to manage this pain.
Sexual Dysfunction & Infertility
Chemotherapy drugs and radiation therapy for certain cancers can cause sexual dysfunction and infertility.
Lymphedema
Lymphedema is a condition in which a buildup of lymph fluid in the body causes a body part to swell. Lymphedema typically occurs in the head, neck, arms, and legs.

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Digestive Problems
Chemotherapy and radiation therapy can damage the rapidly-dividing cells in the digestive tract. Some cancer survivors may experience problems such as chronic diarrhea and constipation. Patients with digestive problems may not be able to absorb all the required nutrients from the food they eat, which can lead to more serious problems like dehydration, malnutrition, pain, and inflammation. Talk to your doctor if you experience excessive or uncontrollable diarrhea. This side-effect can be life-threatening if not managed properly.

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Heart Problems
Certain chemotherapy drugs and radiation therapy to the chest cavity can damage the heart. The risk of heart damage increases with the age of the patient and the dosage of medication received. Chemotherapy medications that may cause heart damage include anthracyclines such as doxorubicin and epirubicin, and others such as cyclophosphamide, paclitaxel, and trastuzumab. These medications can cause inflammation of the heart muscle (myocarditis), congestive heart failure, arrhythmias, coronary artery disease, problems with the heart valves, and problems with the heart's electrical system. These conditions can increase the risk of heart attack and stroke. Ask your physician if your treatment plan puts you at risk for heart damage.

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Lung Problems
Certain chemotherapy drugs and radiation therapy to the chest cavity can damage the lungs. Medications most likely to damage the lungs include: bleomycin, carmustine, prednisone, dexamethasone, methotrexate, and cyclophosphamide. These medications can cause inflammation (pneumonitis) and scarring (pulmonary fibrosis) of the lung tissue, which can cause difficulty breathing, shortness of breath, coughing, wheezing, and fatigue. Pneumonitis is a condition in which the alveoli become inflamed, making it difficult to breath and absorb oxygen into the bloodstream. Pulmonary fibrosis is a condition in which scar tissue forms on the lungs, causing them to lose elasticity and making it difficult for the lungs to expand and fill with air properly. Ask your physician if your treatment plan puts you at risk for lung damage.

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Bone Problems
Osteoporosis is a condition that causes the bones to lose density and become weak and fragile. Many people, especially women, develop osteoporosis as they get older. This disease can greatly increase the risk of bone fractures and breaks. Certain chemotherapy drugs can decrease the amount of calcium in the body, and accelerate osteoporosis and bone thinning. Hormone therapy, radiation therapy, and steroid medications may also cause bone problems. Ask you physician if you are at risk for bone damage from your cancer treatments.

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Liver Problems
The liver is an organ whose primary functions include releasing bile into the intestines to aid in digestion, breaking down and storing nutrients, clearing medications from the body and removing toxic substances from the blood. Certain chemotherapy drugs can place added stress on the liver, which can eventually damage the liver and prevent it from functioning properly. Symptoms of liver damage may include dark urine, yellow skin and eyes (jaundice), abdominal pain, swelling in the abdomen, weakness, and fatigue. Ask your doctor if your cancer medications put you at risk for liver damage, and what steps you may take to prevent this complication.

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Kidney Problems
Your kidneys are two fist-sized, bean-shaped organs located in the back of your torso, just above your waist. Your kidneys are responsible for filtering waste and excess water from your blood and turning it into urine. Certain cancer medications, including chemotherapies and biological therapies, can damage the kidneys and cause this excess water and waste to build up in the body and cause the kidneys to stop functioning properly. The risk of kidney damage is higher in patients with comorbidities such as pre-existing kidney damage, diabetes, and heart disease. Symptoms of kidney damage may include dark urine, pain when urinating, blood in the urine, fatigue, and muscle weakness. Cancer medications that may cause kidney damage include cisplatin, interleukin-2, cytarabine, methotrexate, carboplatin, and others. Ask your physician if you are at risk for kidney damage and what steps you may take to prevent/inhibit this damage.

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Secondary Cancers
Certain cancer treatments can increase the risk of developing secondary cancers later in life, especially if you were treated for cancer as a child. Alkylating agents such as cyclophosphamide, cisplatin, and carboplatin, anthracyclines such as doxurubicin and epirubicin, and other chemotherapy medications carry the greatest risk. Acute Myeloid Leukemia (AML) is the most common secondary cancer caused by these medications. MDS and ALL may also occur in some cases. Radiation therapy can also increase risk of developing a secondary cancer. The most common cancer types linked to radiation therapy are leukemia and solid tumors of the thyroid, skin, bone, breast, and lung. The risk depends on the radiation dosage, the area of treatment, and the patient's age at time of treatment.