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F12
This test measures the amount of a protein called coagulation factor XII in your blood. Factor XII is one of several clotting factors.
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FA12-human
This test measures the amount of a protein called coagulation factor XII in your blood. Factor XII is one of several clotting factors.
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Facelift
During a facelift procedure, excess facial fat is removed, facial muscles are tightened, and the skin is stretched to make a smoother appearance.
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Facial Skin, Chemical Peel
Detailed information on chemical peels, including potential complications and what substances are used for chemical peels
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Factor assays
This test checks for a deficiency in a protein in the blood known as Factor X. This protein helps with clotting.
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Factor I
This test measures the amount of a protein called factor I, or fibrinogen, in your blood. It helps find out if you have a bleeding or clotting disorder.
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Factor I (Fibrinogen)
This test measures the amount of a protein called factor I, or fibrinogen, in your blood. It helps find out if you have a bleeding or clotting disorder.
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Factor II
This test measures how much of the protein prothrombin, or factor II, is in your blood. It can help diagnose bleeding and clotting disorders.
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Factor II (Prothrombin)
This test measures how much of the protein prothrombin, or factor II, is in your blood. It can help diagnose bleeding and clotting disorders.
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Factor II assay
This test measures how much of the protein prothrombin, or factor II, is in your blood. It can help diagnose bleeding and clotting disorders.
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Factor IX (Antihemophilic Factor B)
The factor IX test is part of a larger screening to find out which type of hemophilia you have.
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Factor IX deficiency test
The factor IX test is part of a larger screening to find out which type of hemophilia you have.
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Factor IX hemophilia
The factor IX test is part of a larger screening to find out which type of hemophilia you have.
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Factor V
This test looks for a deficiency in a protein called factor V. This protein is one of your body's "clotting factors." When you have too little factor V, you may have bleeding problems.
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Factor V assay
This test looks for a deficiency in a protein called factor V. This protein is one of your body's "clotting factors." When you have too little factor V, you may have bleeding problems.
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Factor VIII (Antihemophilic Factor A)
This test helps find out whether you have hemophilia A or another clotting disorder.
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Factor VIII coagulant activity test
This test is used to diagnose von Willebrand disease, a bleeding disorder that causes excessive bleeding after minor injuries.
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Factor VIII:C
This test helps find out whether you have hemophilia A or another clotting disorder.
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Factor X
This test checks for a deficiency in a protein in the blood known as Factor X. This protein helps with clotting.
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Factor XI
This test measures the amount of factor XI in your blood. Factor XI is a substance that plays an important role in blood clotting.
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Factor XI deficiency test
This test measures the amount of factor XI in your blood. Factor XI is a substance that plays an important role in blood clotting.
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Factor XII
This test measures the amount of a protein called coagulation factor XII in your blood. Factor XII is one of several clotting factors.
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Facts About Blood
Detailed information on blood, including components of blood, functions of blood cells and common hematology tests
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Facts About Diabetes
Diabetes affects the way the body metabolizes, or uses, digested food to make glucose, the main source of fuel for the body.
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Facts About Skin Cancer
Statistics relating to skin cancer
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Facts About the Spine, Shoulder, and Pelvis
Detailed anatomical description of the spine, shoulder, and pelvis, including full-color, labeled illustrations
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FAI
This test is used to find out whether your levels of the hormone androgen are normal. The levels are different for men and women.
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Failure to Thrive
Failure to thrive means that a child is not growing as he or she should. Psychological, social, or economic problems within the family almost always play a role in this condition.
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False Teeth
Detailed information on the most common types of dentures
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FANA
This blood test is done to help your doctor diagnose a type of illness called an autoimmune disease.
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Fanconi Anemia
Fanconi anemia is a blood disorder in which the bone marrow doesn’t make enough blood cells or makes abnormal types of blood cells.
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Fasting lipoprotein panel
This test measures the amount of triglycerides in your blood. This test is part of a group of cholesterol and blood fat tests called a fasting lipoprotein panel, or lipid panel.
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Fasting plasma glucose
A blood glucose test tells you whether your level of glucose is within a healthy range. Fasting plasma glucose is a common test for diagnosing diabetes.
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Fat in stool
This test measures the amount of fat in your stool. Having too much fat in your stool may mean that you have malabsorption.
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Fecal (poop) smear
This test looks for harmful bacteria called Campylobacter in a culture sample from your stool.
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Fecal Diversion
A colostomy is an operation that creates an opening for the colon, or large intestine, through the abdomen. A colostomy may be temporary or permanent. It is usually performed after bowel surgery or injury.
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Fecal Fat
This test measures the amount of fat in your stool. Having too much fat in your stool may mean that you have malabsorption.
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Fecal fat stain
This test measures the amount of fat in your stool. Having too much fat in your stool may mean that you have malabsorption.
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Fecal Occult Blood Test
A fecal occult blood test checks a stool sample for blood that can't be seen with the naked eye. Blood in the stool is a sign of bleeding in the digestive tract.
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Fecal smear
This test looks for parasites and their larvae or eggs in a sample of your stool.
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Female Sterilization
Tubal ligation is surgical procedure you may choose if you are an adult woman and you do not want to get pregnant in the future. You may have heard tubal ligation referred to as "getting your tubes tied."
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Femoral Artery Percutaneous Transluminal Angioplasty
Femoral popliteal (also called femoropopliteal) bypass surgery is a surgical procedure that may be used to treat severe blockage due to plaque in the femoral artery. The femoral and popliteal arteries are located in the legs.
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Femoral Popliteal Bypass Surgery
Femoral popliteal (also called femoropopliteal) bypass surgery is a surgical procedure that may be used to treat severe blockage due to plaque in the femoral artery. The femoral and popliteal arteries are located in the legs.
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Fem-Pop
Femoral popliteal (also called femoropopliteal) bypass surgery is a surgical procedure that may be used to treat severe blockage due to plaque in the femoral artery. The femoral and popliteal arteries are located in the legs.
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Fem-Pop Bypass
Femoral popliteal (also called femoropopliteal) bypass surgery is a surgical procedure that may be used to treat severe blockage due to plaque in the femoral artery. The femoral and popliteal arteries are located in the legs.
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Ferritin (Blood)
This test measures how much iron is in your blood. Too much or too little iron can cause health problems.
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Fetal Alcohol Syndrome
Fetal alcohol syndrome refers to a group of abnormalities in babies born to mothers who drink during pregnancy. The problems include small head and brain, facial abnormalities, and defects of other organs.
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Fetal Fibronectin
This test measures the amount of a protein made during pregnancy. It can help your doctor know if you are at risk for premature delivery.
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Fetal Monitoring, External and Internal
The fetal heart rate may change as the fetus responds to conditions in the uterus. An abnormal fetal heart rate or pattern may indicate that the fetus is not getting enough oxygen or that there are other problems.
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Fetal Ultrasound
Fetal ultrasound is a test used during pregnancy that creates an image of the fetus in the mother's uterus, or womb.
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Fever
Detailed information on fever, including when to call your physician
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Fever Blister
Detailed information on cold sores and herpes simplex virus 1
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Fevers
When your child has a fever, the body resets its thermostat at a higher temperature. This helps the body fight off invading microorganisms.
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Fiberoptic Bronchoscopy (FOB)
A brochosopy is a procedure in which a long, lighted scope is inserted into the lungs in order to examine the airways of the lungs and to assess lung function.
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Fiberoptic Joint Examination
Orthopedic surgeons use arthroscopy to diagnose and treat joint problems. An arthroscope is a small, tube shaped instrument that is used to look inside a joint.
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Fibrin degradation fragment
This test is used to rule out whether you have a blood clot. When blood clots form and start to break down, they release the substance D-dimer into the blood.
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Fibrocystic Breast Changes
Detailed information on common fibrocystic breast changes, including what fibrocystic changes feel like
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Fibromyalgia
Detailed information on fibromyalgia, including cause, triggers, symptoms, diagnosis, and treatment
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Fibromyalgia in Children
Detailed information fibromyalgia, including causes, symptoms, diagnosis, and treatment
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Fifth Disease
Fifth disease is caused by the human parvovirus. It is most prevalent in the winter and spring and is usually seen in school-aged children.
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Fillings
Detailed information on tooth fillings, including the different types such as dental amalgams, composite resins, porcelain veneers, crowns, and cast gold restorations
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Fine Needle Aspiration Breast Biopsy
A breast biopsy is a procedure in which samples of breast tissue are removed with a special biopsy needle or during surgery to determine if cancer or other abnormal cells are present.
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Fine Needle Biopsy of the Prostate
A prostate biopsy is a procedure in which tissue samples are removed with a special needle to determine if cancer or other abnormal cells are present.
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Finger Arthroplasty
Arthroplasty is a surgical procedure that restores the function of a joint. A joint can be restored by resurfacing the bones, or by replacing it with an artificial joint.
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Fire Safety
Detailed information on fire and burn safety
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Firearms Safety
Detailed information on firearm safety and prevention
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First Aid, Choking
Detailed information on choking, choking prevention, and the Heimlick maneuver
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First Trimester Screening
Certain tests and screenings may be scheduled during your pregnancy. Your health care provider will advise you on which tests you'll need.
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First-Aid Kit
Detailed list of recommended items for a household first-aid kit
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Fish Poisoning
At certain times of the year, various species of fish and shellfish contain toxins, even if well cooked. The most common type of fish poisoning in travelers is ciguatera fish poisoning.
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FIX
The factor IX test is part of a larger screening to find out which type of hemophilia you have.
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Flap Surgery
Two common techniques are endoscopic surgery, performed with a tubular probe, and flap surgery, in which healthy tissue is moved from one part of the body to another.
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Flat or Inverted Nipples
Detailed information on breastfeeding and flat or inverted nipples
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Flat Plate of the Abdomen
Abdominal X-rays are used to diagnose internal injuries or abnormalities of the bones and organs.
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Flat Plate of the Abdomen X-ray
A KUB x-ray may be the first diagnostic procedure used to assess the urinary system; to find the cause of abdominal pain, such as masses, perforations, or obstruction; or to evaluate the urinary tract before other diagnostic procedures are performed.
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Fleas, Mites, and Chiggers
Detailed information on flea, mite, and chiggers bites
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Flexible Bronchoscopy
A brochosopy is a procedure in which a long, lighted scope is inserted into the lungs in order to examine the airways of the lungs and to assess lung function.
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Flexible Sigmoidoscopy
A sigmoidoscopy is a procedure that allows the physician to examine the lower one-third of the large intestine and is helpful in identifying the causes of diarrhea, abdominal pain, constipation, abnormal growths, and bleeding.
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Flossing
Detailed information on the importance of proper flossing technique
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Fluorescent Antinuclear Antibody Test
This blood test is done to help your doctor diagnose a type of illness called an autoimmune disease.
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Fluoride
Detailed information on fluoride
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Fluoroscopy
Fluoroscopy is a study of moving body structures—similar to an X-ray "movie."
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Fluoroscopy Procedure
Fluoroscopy is a study of moving body structures—similar to an X-ray "movie."
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Fluoroscopy, Chest
Chest fluoroscopy may be performed when the motion of the lungs, diaphragm, or other structures in the chest need to be evaluated.
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Fluphenazine Drug Level (Blood)
This test measures the amount of fluphenazine in your blood. The medication is used to treat schizophrenia and Tourette's syndrome.
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FMR1 test
This test checks a sample of your amniotic fluid to find out whether your fetus may have fragile X syndrome, a rare genetic disorder.
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FOB
A brochosopy is a procedure in which a long, lighted scope is inserted into the lungs in order to examine the airways of the lungs and to assess lung function.
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FOBT
A fecal occult blood test checks a stool sample for blood that can't be seen with the naked eye. Blood in the stool is a sign of bleeding in the digestive tract.
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Folate
This test measures the amount of folate in either your serum or your red blood cells.
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Folic acid test
This test measures the amount of folate in either your serum or your red blood cells.
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Follicle-Stimulating Hormone
This test measures the level of follicle-stimulating hormone (FSH), an important hormone made in your pituitary gland.
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Folliculitis, Boils, and Carbuncles
Detailed information on folliculitis, boils, and carbuncles
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Food Allergies
Detailed information on food allergy, including food intolerance and food allergy symptoms, diagnosis, and treatment
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Food Allergies in Children
Detailed information on food allergy, including cause, symptoms, and treatment
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Food Poisoning
Detailed information on food poisoning, including causes, symptoms, treatment, and prevention
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Foods
Detailed information on food allergy, including cause, symptoms, and treatment
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Foot Pain and Problems
Foot pain is often caused by improper foot function. Improperly fitted shoes can worsen and, in some cases, cause foot problems.
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Foot X-ray
This procedure is often used as the first step in diagnosing injuries of the extremities, but may also be used to evaluate other problems involving the bones and/or soft tissues.
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For Family Members Coping with Prostate Cancer
What can you do to help the man in your life with prostate cancer? Keep the lines of communication open.
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For Parents: Bicycle, In-Line Skating, Skateboard, and Scooter Safety
Detailed information on bicycle, in-line skating, skateboarding, and scooter safety
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Forehead Lift
A forehead lift can correct sagging brows or deep furrows between the eyes. It is often done in conjunction with a facelift, in order to create a smoother facial appearance overall.
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Foreign Bodies in the Ear, Nose, and Airway
Children usually place things in their ears because they are bored, curious, or copying other children. Some objects may cause no symptoms, but other objects, such as food and insects, may cause pain in the ear, redness, or drainage.
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Forms of Diabetes
Detailed information on the three forms of diabetes: type 1 diabetes, type 2 diabetes, and gestational diabetes
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FPG
A blood glucose test tells you whether your level of glucose is within a healthy range. Fasting plasma glucose is a common test for diagnosing diabetes.
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Fractures
A fracture is a partial or complete break in the bone. When a fracture occurs, it is classified as either open or closed.
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Fractures in Children
Fractures occur when more force is applied to the bone than the bone can absorb. Bones are weakest when they are twisted.
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Fractures of the Orbit
The orbit is the bony structure around the eye. A blow to the face can break one or more of these bones and can result in severe eye injury and damage.
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Fragile X DNA test
This test checks a sample of your amniotic fluid to find out whether your fetus may have fragile X syndrome, a rare genetic disorder.
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Fragile X Syndrome (Amniotic Fluid)
This test checks a sample of your amniotic fluid to find out whether your fetus may have fragile X syndrome, a rare genetic disorder.
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Fragment D-dimer
This test is used to rule out whether you have a blood clot. When blood clots form and start to break down, they release the substance D-dimer into the blood.
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Free and Bound T4
This is a blood test to measure your level of the hormone thyroxine, or T4. This test can show your doctor whether your thyroid gland is overactive, a condition called hyperthyroidism, or underactive, a condition called hypothyroidism.
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Free and Bound Triiodothyronine (Blood)
This test measures the level of triiodothyronine (T3) in your blood. T3 is a type of hormone made by your thyroid gland.
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Free Androgen Index
This test is used to find out whether your levels of the hormone androgen are normal. The levels are different for men and women.
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Free Light Chains (Blood)
This test looks for signs of antibodies called immunoglobulins in your blood. It can help diagnose an illness called multiple myeloma.
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Free T4
This test measures the level of free T4 in your blood. It helps your doctor know how well your thyroid is working.
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Free T4 concentration
This is a blood test to measure your level of the hormone thyroxine, or T4. This test can show your doctor whether your thyroid gland is overactive, a condition called hyperthyroidism, or underactive, a condition called hypothyroidism.
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Free Testosterone
This test measures both your total and free testosterone levels. Having levels that are too high or too low can cause health problems.
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Free thyroxine test
This test measures the level of free T4 in your blood. It helps your doctor know how well your thyroid is working.
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Free T-index
This test measures both your total and free testosterone levels. Having levels that are too high or too low can cause health problems.
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Freelite
This test looks for signs of antibodies called immunoglobulins in your blood. It can help diagnose an illness called multiple myeloma.
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Frequently Asked Questions: Mammograms
Timing your mammogram when your breasts are not tender is important. In premenopausal women, this is usually one week after a menstrual period.
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Friedreich’s Ataxia
Friedreich’s ataxia (FA) is a degenerative disease that damages your spinal cord, peripheral nerves, and the cerebellum portion of your brain.
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Frostbite
Detailed information on frostbite, including symptoms and what to do if frostbite occurs
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Frostbite in Children
Detailed information on frostbite, including symptoms and what to do if frostbite occurs
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FSH
This test measures the level of follicle-stimulating hormone (FSH), an important hormone made in your pituitary gland.
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Functional Antithrombin III
The antithrombin activity and antigen tests are used to help find out what may be causing abnormal blood clots in your body.
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Functional AT
The antithrombin activity and antigen tests are used to help find out what may be causing abnormal blood clots in your body.
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Functional fibrinoten
This test measures the amount of a protein called factor I, or fibrinogen, in your blood. It helps find out if you have a bleeding or clotting disorder.
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Fungal Infections
Detailed information on fungal skin infections, including Candidiasis, Tinea Infections, and Tinea Versicolor
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Fungal Infections of the Skin
Detailed information on fungal infections of the skin, including candidiasis (yeast infection), tinea infection (ringworm), and tinea versicolor
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FXI
This test measures the amount of factor XI in your blood. Factor XI is a substance that plays an important role in blood clotting.
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