Consumer health basics
Learning Center
DiGeorge syndrome (22q11.2 deletion syndrome)
This condition is due to missing part of chromosome 22. It may cause heart issues, thyroid problems, cleft palate, lower immunity and other health problems.
Dermatitis
Learn about the symptoms, causes and treatments of this itchy skin condition that affects children and adults, and about how moisturizers help prevent it.
Delayed ejaculation
Learn what can cause delayed or absent ejaculation and how it can be treated.
Dehydration
Dehydration is especially common and dangerous for infants, young children and older adults. Learn more about treating and preventing dehydration.
Cytomegalovirus (CMV) infection
Understand the symptoms and treatment of this common viral infection that can cause health problems for babies and people who have weakened immunity.
Cystic fibrosis
This inherited condition causes severe damage to the lungs, digestive system and other organs. Learn about improvements in screening and treatments.
Craniosynostosis
This condition results in premature fusing of one or more of the joints between the bone plates of an infant's skull before the brain is fully formed.
Craniopharyngioma
Learn more about this noncancerous tumor that forms near the brain's pituitary gland, including diagnosis and treatment options.
Coronavirus disease 2019 (COVID-19)
Coronavirus disease 2019 (COVID-19) is an illness caused by the virus SARS-CoV-2. Learn more about the symptoms, risks and ways to protect yourself.
Conjoined twins
If an early embryo only partially separates and two babies develop, they remain physically connected — most often at the chest, abdomen or pelvis.
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