• Clinical Services
  • For Patients
  • For Visitors
  • Medical Professionals
  • Hospitals & Locations
  • Our Story
  • Find a Career
  • Find a Physician
  • My Account
  • Make a Payment
Skip Navigation

Health Library


Health Library
  Search



TitlesFull text

Health Library: L

LA
This is a specialized blood test to determine whether your body is producing certain antibodies or proteins that cause you to have a blood-clotting disorder.

LA Sensitive PTT
This is a specialized blood test to determine whether your body is producing certain antibodies or proteins that cause you to have a blood-clotting disorder.

Lab Tests, Cultures
Detailed information on microbiology and the most common microbiology tests

Lab Tests, Microbiology
Detailed information on microbiology and the most common microbiology tests

Labor
Labor usually starts two weeks before or after the estimated date of delivery. No one knows exactly what triggers the onset of labor.

Labor and Delivery
Detailed information on labor and delivery

Lacerations With Stitches
Stitches, also called sutures, are special types of thread that hold the edges of a wound together while it heals.

Lacerations Without Stitches
A laceration is tear or opening in the skin caused by an injury. Some lacerations are small and need only minor treatment at home.

Lactate Dehydrogenase (CSF)
This test measures the amount of an enzyme in your cerebrospinal fluid. The test can help diagnose diseases and conditions that affect your central nervous system.

Lactate Dehydrogenase Isoenzymes
This test measures different enzymes in your blood. You may need this test if you've had a heart attack, or if you have a blood disorder or liver damage.

Lactate hydrogenase
This test looks at how much of the enzyme LDH you have in your blood. Higher levels of this substance could mean you've had a heart attack or other tissue damage.

Lactic Acid Dehydrogenase (Blood)
This test looks at how much of the enzyme LDH you have in your blood. Higher levels of this substance could mean you've had a heart attack or other tissue damage.

Lactic acid dehydrogenase (CSF)
This test measures the amount of an enzyme in your cerebrospinal fluid. The test can help diagnose diseases and conditions that affect your central nervous system.

Lactic dehydrogenase
This test measures different enzymes in your blood. You may need this test if you've had a heart attack, or if you have a blood disorder or liver damage.

Lactic dehydrogenase
This test looks at how much of the enzyme LDH you have in your blood. Higher levels of this substance could mean you've had a heart attack or other tissue damage.

Lactose breath test
This test measures the amount of hydrogen gas in your breath. It can help find out if you are unable to digest milk and other dairy products.

Lactose Intolerance
Detailed information on lactose intolerance, including causes, symptoms, diagnosis, and treatment

Lactose Intolerance in Children
Detailed information on lactose intolerance, including causes, symptoms, diagnosis, and treatment

Lactose Tolerance (Blood)
This test tells whether your body is able to break down lactose, a sugar found in milk and other dairy products. If you can't digest lactose, you have lactose intolerance.

Lactose Tolerance Hydrogen (Breath)
This test measures the amount of hydrogen gas in your breath. It can help find out if you are unable to digest milk and other dairy products.

Lactose tolerance serum
This test tells whether your body is able to break down lactose, a sugar found in milk and other dairy products. If you can't digest lactose, you have lactose intolerance.

Laminectomy
Laminectomy is a type of surgery in which a physician removes part or all of the vertebral bone to relieve compression of the spinal cord or the nerve roots.

Landau-Kleffner Syndrome
Detailed information on Landau-Kleffner syndrome, including signs, diagnosis, and treatment

Langerhans Cell Histiocytosis
Langerhans cell histiocytosis most often strikes young children and causes damage to tissues throughout the body.

Language Disorders
Detailed information on the most common types of language disorders, including aphasia and Landau-Kleffner syndrome

Language Pathologist
A speech/language pathologist helps treat people with communication problems that result from disability, surgery, or developmental disorders. This specialist also treats people with swallowing disorders caused by stroke or brain injury.

Lap Band Surgery
Gastric banding is a form of bariatric surgery. It is used to treat people with severe obesity who have trouble losing weight through diet or exercise alone.

Laparoscopic Adjustable Gastric Banding
Laparoscopic adjustable gastric banding (LAGB) is one of the least invasive operations available for obesity. It is also one of the more effective.

Laparoscopic Appendectomy
A person's appendix is sugically removed if they develop appendicitis - an inflammation of the appendix caused by infection.

Laparoscopic Cecostomy Tube Placement
Cecostomy is a fairly new surgical procedure that is used to clear the bowels of fecal matter. It’s typically used for children with fecal incontinence related to severe disorders.

Laparoscopic Cholecystectomy
A cholecystectomy is the surgical removal of the gallbladder and is performed if it develops gallstones, becomes inflamed or infected, or is cancerous.

Laparoscopic Proctectomy

Laparoscopy
Laparoscopy is a procedure that utilizes a laparoscope, a thin flexible tube containing a video camera to examine the organs of the abdominal cavity.

Laparoscopy, Exploratory
Laparoscopy is a procedure that utilizes a laparoscope, a thin flexible tube containing a video camera to examine the organs of the abdominal cavity.

Laparoscopy, Gynecologic
Laparoscopy is a procedure that utilizes a laparoscope, a thin flexible tube containing a video camera to examine the organs of the abdominal cavity.

Large for Gestational Age (LGA)
The average baby weighs about 7 pounds at birth. About 10 percent of all babies weigh more than 8 pounds, 13 ounces. Rarely do babies weigh over 10 pounds.

Large Loop Excision of the Cervix (LLEC)
Loop electrosurgical excision procedure (LEEP) uses a wire loop heated by electric current to remove cells and tissue as part of the diagnosis and treatment for abnormal or cancerous conditions in a woman’s lower genital tract.

Large Loop Excision of the Transformation Zone (LLETZ)
Loop electrosurgical excision procedure (LEEP) uses a wire loop heated by electric current to remove cells and tissue as part of the diagnosis and treatment for abnormal or cancerous conditions in a woman’s lower genital tract.

Laryngeal Cancer (Cancer of the Larynx)
Detailed information on laryngeal cancer (cancer of the larynx), including symptoms, cause, risk factors, diagnosis, and treatment

Laser Resurfacing
Detailed information on different techniques for acne scar removal, including dermabrasion, chemical peels, collagen injections, laser resurfacing, punch grafts, and autologous fat transfer

Laser Surgery for Lesions and Skin Conditions
Detailed information on laser surgery for skin conditions

Laser Surgery Overview
Detailed information on laser surgery and what types of surgeries may be performed with lasers

Laser Surgery, Skin Conditions
Detailed information on laser surgery for skin conditions

Laser Varicose Vein Surgery
Sometimes your veins can become swollen and bulging. These are called varicose veins.

Laser Vein Removal
Sometimes your veins can become swollen and bulging. These are called varicose veins.

LCL Reconstruction
Knee ligament repair is used when a knee ligament is torn and results in instability in the knee.

LCL Repair
Knee ligament repair is used when a knee ligament is torn and results in instability in the knee.

LCL Repair/Reconstruction
Knee ligament repair is used when a knee ligament is torn and results in instability in the knee.

LDH
This test measures different enzymes in your blood. You may need this test if you've had a heart attack, or if you have a blood disorder or liver damage.

LDH
This test looks at how much of the enzyme LDH you have in your blood. Higher levels of this substance could mean you've had a heart attack or other tissue damage.

LDH CSF
This test measures the amount of an enzyme in your cerebrospinal fluid. The test can help diagnose diseases and conditions that affect your central nervous system.

LDL Cholesterol
This test measures the amount of LDL cholesterol in your blood. It may be done as part of a routine exam for high cholesterol.

LDL-C
This test measures the amount of LDL cholesterol in your blood. It may be done as part of a routine exam for high cholesterol.

L-dopa
This test measures the level of growth hormone in your blood by stimulating hormone production.

Lead (Blood)
This test measures the amount of lead in your child’s blood. High levels of lead in the blood can be toxic.

Lead Poisoning
Detailed information on lead poisoning

Lead Poisoning in Children
Lead poisoning is a totally preventable disease. Children ages 1 to 3 who live in low-income housing built before 1978 are especially at risk.

Lead poisoning test
This test measures the levels of lead in your blood. You may be exposed to lead on your job or through lead-based paint used in your home.

Learning Disorders
Learning disorders are sometimes called learning disabilities. Most children with learning disorders have normal intelligence, but they have difficulty with reading, math, or another academic area.

Lecithin-Sphingomyelin Ratio (Amniotic Fluid)
This test measures two substances found in amniotic fluid near the end of pregnancy. The amounts can tell your doctor how mature your unborn baby's lungs are.

LEEP
Loop electrosurgical excision procedure (LEEP) uses a wire loop heated by electric current to remove cells and tissue as part of the diagnosis and treatment for abnormal or cancerous conditions in a woman’s lower genital tract.

Leg 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.

Legg-Calvé-Perthes Disease
This disease is a temporary condition that causes the hip joint to become painful and stiff.

Legionella Antibody
This test looks for an antibody that may be in your blood if you have Legionnaires’ disease. This disease is a type of pneumonia or serious lung infection.

Legionella antibody assay
This test looks for an antibody that may be in your blood if you have Legionnaires’ disease. This disease is a type of pneumonia or serious lung infection.

Legionnaires’ disease antibody test
This test looks for an antibody that may be in your blood if you have Legionnaires’ disease. This disease is a type of pneumonia or serious lung infection.

Leptin (Blood)
This test measures the amount of leptin in your blood. The test can help figure out how much body fat you have.

Leptin serum test
This test measures the amount of leptin in your blood. The test can help figure out how much body fat you have.

Leukemia
Detailed information on leukemia in childhood, including symptoms, staging, diagnosis, and treatment

Leukemia Index
Detailed information on leukemia in childhood, including symptoms, staging, diagnosis, and treatment

LH
This test measures the level of luteinizing hormone in your blood. It can help figure out the cause of infertility or diagnose a pituitary disorder.

Lice
Detailed information on lice, including diagnosis and treatment

Lichen Planus
Lichen planus is a common disease that causes inflammation (swelling and irritation) on your skin or inside your mouth. On your skin, lichen planus causes a rash that is usually itchy. Inside your mouth, it may cause burning or soreness.

Lifestyle Changes
Living a healthier lifestyle can help to prevent heart disease. This means eliminating all tobacco, following a heart-healthy diet, and getting regular exercise.

Lipase
This test measures the amount of lipase in your blood. Lipase is an enzyme that is made by your pancreas. Higher levels may mean you have a problem with your pancreas.

Lipid 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.

Lipid Panel
This group of tests measures the amount of cholesterol and other fats in your blood.

Lipid Panel with Non-HDL Cholesterol
This test measures your level of LDL ("bad") cholesterol. The higher your LDL levels, the greater your risk for heart disease.

Lipid Panel with Total Cholesterol: HDL Ratio
This group of tests measures the amount of cholesterol and triglycerides in your blood. This test looks at the ratio between total and HDL cholesterol levels.

Lipid profile
This group of tests measures the amount of cholesterol and other fats in your blood.

Lipoplasty
Liposuction removes excess body fat through a suctioning process. It is not a substitute for weight loss, but it does change the body's shape and contour.

Lipoprotein profile
This group of tests measures the amount of cholesterol and other fats in your blood.

Lipoprotein(a) Cholesterol
This test measures the level of lipoprotein (a) in your blood. A high level of this cholesterol may mean you have heart disease or another cholesterol-related condition.

Lipoprotein-Associated Phospholipase A2
This test looks for a specific lipoprotein, Lp-PLA2, in your blood. The test is used to help predict your risk for cardiovascular disease and stroke.

Liposarcoma
A liposarcoma is a rare type of cancer that develops in your fatty tissue. This type of tumor can grow anywhere in your body. Common places include your abdomen, thigh, and behind your knee.

Liposculpture
Liposuction removes excess body fat through a suctioning process. It is not a substitute for weight loss, but it does change the body's shape and contour.

Liposuction
Liposuction removes excess body fat through a suctioning process. It is not a substitute for weight loss, but it does change the body's shape and contour.

Listeriosis
You’ve probably been warned not to eat brie cheese or order your steak cooked to anything less than medium. Why do you have to take these precautions? Listeriosis. Learn more about this food-borne illness and how to avoid it.

Lithium
This test measures and monitors the amount of lithium in your blood. Lithium is a medication used to treat certain psychiatric illnesses.

Lithium blood test
This test measures and monitors the amount of lithium in your blood. Lithium is a medication used to treat certain psychiatric illnesses.

Lithium levels
This test measures and monitors the amount of lithium in your blood. Lithium is a medication used to treat certain psychiatric illnesses.

Lithotripsy
Lithotripsy treats certain kidney stones with ultrasonic energy, or shock waves, once they are located with fluoroscopy or ultrasound.

Liver Biopsy
A liver biopsy is a procedure in which tissue samples from the liver are removed for examination under a microscope to look for signs of damage or disease. It is used to diagnose many liver conditions.

Liver CT Scan
CT/CAT scans are more detailed than standard x-rays and are often used to assess the liver, gallbladder and bile ducts for for injuries, abnormalities, or disease.

Liver Disease Statistics
Statistics relating to liver, biliary, and pancreatic disorders

Liver Disease, Diagnosis
Detailed information on the most common diagnostic procedures for liver, biliary, and pancreatic disorders

Liver function panel (LFP)
This group of tests measures specific proteins and enzymes in your blood. It can tell how healthy your liver is and help diagnose liver disease or damage.

Liver function test (LFT)
This group of tests measures specific proteins and enzymes in your blood. It can tell how healthy your liver is and help diagnose liver disease or damage.

Liver Function Tests
Detailed information on the most common liver function tests, including serum bilirubin test, serum albumin test, serum alkaline phosphatase test, serum aminotransferases, prothrombin time test, alanine transaminase test, aspartate transaminase test, gamm

Liver Kidney Microsomal Antibody
This test looks for a certain type of antibody in your child’s blood. Having this antibody may mean that your child has liver damage caused by a form of hepatitis.

Liver Panel
This group of tests measures specific proteins and enzymes in your blood. It can tell how healthy your liver is and help diagnose liver disease or damage.

Liver Scan
A liver scan - also known as a liver-spleen scan - uses nuclear radiology to assess the function and structure of the liver and surrounding organs. It may also be used to assess the progress of treatment for certain conditions.

Liver Scintigraphy
A liver scan - also known as a liver-spleen scan - uses nuclear radiology to assess the function and structure of the liver and surrounding organs. It may also be used to assess the progress of treatment for certain conditions.

Liver Transplantation Procedure
Detailed information on liver transplantation, including the reasons and preparation for the procedure, how the procedure is performed, after care, and an anatomical illustration of the liver

Liver Tumors
Detailed information on liver tumors, including types, symptoms, staging, diagnosis, and treatment

Liver, Biliary, and Pancreatic Diagnostic Procedures
Detailed information on the most common diagnostic procedures for liver, biliary, and pancreatic disorders

Liver, BilliaryTract, Pancreas, Spleen, and Gallbladder CT
CT/CAT scans are more detailed than standard x-rays and are often used to assess the liver, gallbladder and bile ducts for for injuries, abnormalities, or disease.

Liver-Biliary Scan
A gallbladder scan - also known as a liver-billiary scan - uses nuclear radiology to assess the function and structure of the gallbladder and surrounding organs.

Liver-Spleen Scan
A liver scan - also known as a liver-spleen scan - uses nuclear radiology to assess the function and structure of the liver and surrounding organs. It may also be used to assess the progress of treatment for certain conditions.

Lobectomy
A lobectomy is a surgical procedure that removes one of the lobes of the lungs.

Local Anesthesia
During surgery, you will be given some form of anesthesia—medication administered for the relief of pain and sensation during surgery. The type and dosage of anesthesia is determined by the anesthesiologist.

Long QT Syndrome
Your heartbeat is a complex bodily function — many systems must work in unison. Disruptions in the electrical activity of your heart can lead to problems. Long QT syndrome (LQTS) is one of them.

Loop Cone Biopsy of the Cervix
Loop electrosurgical excision procedure (LEEP) uses a wire loop heated by electric current to remove cells and tissue as part of the diagnosis and treatment for abnormal or cancerous conditions in a woman’s lower genital tract.

Loop Electrosurgical Excision Procedure (LEEP)
Loop electrosurgical excision procedure (LEEP) uses a wire loop heated by electric current to remove cells and tissue as part of the diagnosis and treatment for abnormal or cancerous conditions in a woman’s lower genital tract.

Lordosis
A spine affected by lordosis has a curve in the vertebrae in the lower back area, giving the child a "swayback" appearance.

Low Back Pain
Low back pain can range from mild, dull, and annoying to persistent, severe, and disabling pain. Pain in the lower back can restrict mobility and interfere with normal functioning.

Low Birthweight
If your baby’s birthweight was lower than normal due to premature birth or some other factor, don’t worry. With proper medical attention and your loving care, your baby will soon catch up with the other children in the nursery.

Low-density lipoprotein-cholesterol
This test measures the amount of LDL cholesterol in your blood. It may be done as part of a routine exam for high cholesterol.

Lower Abdomen Ultrasound
Ultrasound, or sound wave technology, is used to examine the organs and structures in the female pelvis.

Lower Endoscopy
A colonoscopy uses a small camera to examine the inside of the colon. It is typically used to screen for colon cancer, and to asses other injuries, abnormalities, or disease.

Lower Gastrointestinal Series
A barium enema is used to highlight damage or abnormalities in the colon and rectum by creating greater areas of contrast in x-ray film.

Lower GI Endoscopy
A colonoscopy uses a small camera to examine the inside of the colon. It is typically used to screen for colon cancer, and to asses other injuries, abnormalities, or disease.

Lower GI Series
A barium enema is used to highlight damage or abnormalities in the colon and rectum by creating greater areas of contrast in x-ray film.

Lower Limb Venography
A combination of contrast dye and X-rays are used to visualize the veins in the legs in order to diagnose deep vein thrombosis and other conditions.

Low-Vision Devices
Low-vision devices are categorized as either optical or nonoptical. Optical devices are magnifying lenses or closed circuit TV. Nonoptical devices are large-print books and talking computers.

LP
A lumbar puncture (LP), also known as a spinal tap, is a diagnostic and/or therapeutic procedure used to remove a small amount of cerebrospinal fluid for examination and diagnosis of various disorders.

Lp(a)
This test measures the level of lipoprotein (a) in your blood. A high level of this cholesterol may mean you have heart disease or another cholesterol-related condition.

Lp-PLA2
This test looks for a specific lipoprotein, Lp-PLA2, in your blood. The test is used to help predict your risk for cardiovascular disease and stroke.

LS ratio
This test measures two substances found in amniotic fluid near the end of pregnancy. The amounts can tell your doctor how mature your unborn baby's lungs are.

Lumbar Disk Replacement
A lumbar disk replacement is a type of back surgery. It involves replacing a worn or degenerated disk in the lower part of your spine with an artificial replacement made of medical-grade metal or a combination of medical-grade metal and medical-grade plastic.

Lumbar Laminectomy
Laminectomy is a type of surgery in which a physician removes part or all of the vertebral bone to relieve compression of the spinal cord or the nerve roots.

Lumbar puncture
This tests looks for the virus that causes Western equine encephalitis, an infection spread to people through bites from infected mosquitoes.

Lumbar Puncture (LP)
A lumbar puncture (LP), also known as a spinal tap, is a diagnostic and/or therapeutic procedure used to remove a small amount of cerebrospinal fluid for examination and diagnosis of various disorders.

Lumbar Strain (Weight Lifter's Back)
A lumbar strain is an injury to the lower back, which results in damaged tendons and muscles that spasm and feel sore.

Lumbar X-ray
This procedure may be used to diagnose back or neck pain, fractures or broken bones, arthritis, degeneration of the disks, tumors, or other problems.

Lung Biopsy
A lung biopsy is a procedure in which tissue samples are removed with a special needle to determine if cancer or other abnormal cells are present.

Lung Cancer
Detailed information on lung cancer, lung cancer symptom, lung cancer treatment, lung cancer sign, lung cancer medication, malignant lung tumor, lung cancer cause, benign lung tumor, lung cancer risk factor, lung cancer prevention

Lung Disorders and Diseases
Detailed information on lung disorders and diseases, signs of respiratory distress, Chronic Obstructive Pulmonary Diseases (COPD), Asthma, Chronic Bronchitis, Pulmonary Emphysema, Acute Bronchitis, Cystic Fibrosis, Occupational Lung Diseases, Pneumonia, Primary Pulmonary Hypertension, Pulmonary Embolism, Pulmonary Sarcoidosis, Severe Acute Respiratory Syndrome (SARS), Tuberculosis

Lung Disorders, Apnea of Prematurity
It’s a cliché that many new parents need to reassure themselves that the baby is still breathing. But what if your baby really is having breathing problems? A breathing condition called apnea of prematurity affects some babies, especially if they’re born early. But you can learn what symptoms to look for.

Lung Disorders, Pneumonia
Pneumonia is a serious inflammation of the lungs in which the air sacs fill with pus and other liquid.

Lung Function Studies
Pulmonary function tests measure how well your lungs are functioning and are used to help diagnose certain lung disorders.

Lung Function Studies/Tests
Pulmonary function tests measure how well your lungs are functioning and are used to help diagnose certain lung disorders.

Lung Graft
In a lung transplant, one or both diseased lungs are removed and replaced with a healthy lung from another person.

Lung Perfusion Scintigraphy
A lung scan is a procedure that uses nuclear radiology to assess the function and structure of the lungs. It is most often performed when problems with the lungs and respiratory tract are suspected.

Lung Scan
A lung scan is a procedure that uses nuclear radiology to assess the function and structure of the lungs. It is most often performed when problems with the lungs and respiratory tract are suspected.

Lung Surgery
A lobectomy is a surgical procedure that removes one of the lobes of the lungs.

Lung Transplant
In a lung transplant, one or both diseased lungs are removed and replaced with a healthy lung from another person.

Lung Transplantation Procedure
In a lung transplant, one or both diseased lungs are removed and replaced with a healthy lung from another person.

Lupus anticoagulant
This test checks for antibodies that may can help diagnose a condition with abnormal blood clots or an autoimmune disease.

Lupus Anticoagulant
This is a specialized blood test to determine whether your body is producing certain antibodies or proteins that cause you to have a blood-clotting disorder.

Lupus Anticoagulant Panel
This is a specialized blood test to determine whether your body is producing certain antibodies or proteins that cause you to have a blood-clotting disorder.

Lupus Inhibitor
This is a specialized blood test to determine whether your body is producing certain antibodies or proteins that cause you to have a blood-clotting disorder.

Luteinizing Hormone (Blood)
This test measures the level of luteinizing hormone in your blood. It can help figure out the cause of infertility or diagnose a pituitary disorder.

Lying and Stealing
Lying and stealing are common, but inappropriate, behaviors in school-aged children. Most of the time these behaviors will be outgrown.

Lyme Disease
Detailed information on Lyme disease, including ticks that transmit Lyme disease, symptoms, diagnosis, treatment, and prevention

Lyme Disease in Children
Lyme disease is the leading cause of all insect-borne illness in the United States. It is a year-round problem, although April through October is considered tick season.

Lyme disease test
This test measures the level of Borrelia antibodies in your blood. Borrelia burgdorferi bacteria cause Lyme disease.

Lyme disease test (CSF)
This test looks for Borrelia antibodies in your cerebrospinal fluid. Borrelia burgdorferi bacteria cause Lyme disease.

Lymphadenitis
Lymphadenitis is the medical term for an infection in one or more lymph nodes. When lymph nodes become infected, it’s usually because an infection started somewhere else in your body.

Lymphadenopathy
Detailed information on lymphadenopathy, including causes, symptoms, diagnosis, and treatment

Lymphatic Malformations
Detailed information on lymphatic malformation, including cause, symptom, diagnosis, and treatment

Lymphedema Following a Mastectomy
Whenever the normal drainage pattern in the lymph nodes is disturbed or damaged—often during surgery to remove the lymph nodes—the arm may swell. This swelling, caused by too much fluid, is called lymphedema.

Lymphocyte profile
This test finds and counts three types of white blood cells in your blood. White blood cells help your body fight off infections and illness.

Lymphocyte subset panel
This test finds and counts three types of white blood cells in your blood. White blood cells help your body fight off infections and illness.

Lymphomas
Detailed information on lymphomas, including Hodgkin's lymphoma and non-Hodgkin's lymphoma

Lytes
This test measures the main electrolytes in your body: sodium, chloride, potassium, and carbon dioxide.



 

Find a Physician

Search