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Term Definition
CBC and differential

laboratory blood test that measures the levels of red blood cells, white blood cells, platelet levels, hemoglobin and hematocrit

central sleep apnea

when you repeatedly stop breathing during sleep because the brain temporarily stops sending signals to the muscles that control breathing

chronic bronchitis

one type of COPD (chronic obstructive pulmonary disease); the inflamed bronchi produce a lot of mucus leading to coughing and difficulty getting air in and out of the lungs

chronic constipation

a condition of infrequent bowel movements (typically fewer than three stools a week) and difficult passage of stools which persists

chronic diarrhea

diarrhea means passing loose, watery stools three or more times a day; chronic diarrhea symptoms may be continual or they may come and go

cleft lip

a treatable birth defect that occurs when the tissues of the upper jaw and nose do not join as expected during fetal development, resulting in a split (cleft) in the lip

Cleft palate

a treatable birth defect that occures when the roof of the baby's mouth (palate) does not develop normally during pregnancy, leaving an opening (cleft) in the palate that may go through to the nasal cavity

clonic seizures

rhythmic jerking movements of the arms and legs, sometimes on both sides of the body


a procedure used to see inside the colon and rectum; can detect inflamed tissue, ulcers, and abnormal growths; used to look for early signs of colorectal cancer and can help doctors diagnose unexplained changes in bowel habits, abdominal pain, bleeding from the anus, and weight loss

complex partial seizures

affect a larger area of the brain than simple partial seizures and they affect consciousness; person cannot interact normally with other people, is not in control of his or her movements, speech or actions, doesn't know what he or she is doing, and cannot remember afterwards what happened during the seizure

congenital abnormality

significant, definable, structural and/or developmental abnormalities observed at birth

congential heart defect

a problem with the structure of the heart that are present at birth; the most common type of major birth defect

Cortical Vision Impairment (CVI)

a condition where children show abnormal visual responses that aren

CPAP (Continuous Positive Airway Pressur

therapy that uses a machine to help a person who has obstructive sleep apnea (OSA) breathe more easily during sleep; increases air pressure in your throat so that your airway does not collapse when you breathe in

Crohn's Disease

an inflammatory bowel disease (IBD); causes inflammation of the lining of your digestive tract, which can lead to abdominal pain, severe diarrhea and even malnutrition

CT (computed tomography)

a medical imaging method employing tomography created by computer processing; a three dimential image of the inside of an object is generated from a large series of two-dimensional X-ray images taken around a single axis of rotation


bluish discoloration of the skin and mucous membranes caused by a lack of oxygen in the blood