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Chlamydia trachomatis
This common sexually transmitted infection (STI) can lead to serious health problems if left untreated. Learn more about symptoms, treatment and prevention.
Chondrosarcoma
Learn about this rare type of cancer that primarily affects bone, particularly in the shoulders, hips and pelvis. Treatment usually involves surgery.
Chronic cough
A cough that lasts for weeks could be caused by smoking, postnasal drip, asthma, acid reflux, respiratory infections, COPD or another underlying problem.
Chronic pelvic pain
Ongoing pain in the pelvis can be a symptom of another disease or a condition in its own right. Learn how it's diagnosed and treated.
Colon polyps
Have you had your colonoscopy? Colon polyps typically don't cause symptoms, so it's important to have regular screenings.
Crohn's disease
Learn about symptoms and treatment for this debilitating, but treatable, digestive condition.
Cystitis
Cystitis is a condition that affects the bladder. It happens most often when bacteria cause an infection. But there are other causes, too.
Dehydration
Dehydration is especially common and dangerous for infants, young children and older adults. Learn more about treating and preventing dehydration.
Delayed ejaculation
Learn what can cause delayed or absent ejaculation and how it can be treated.
Desmoplastic small round cell tumors
These rare, aggressive cancers most often form in the abdomen. Learn about DSRCT treatments, including surgery, chemotherapy and radiation therapy.
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