- Chemokine
- Chemokine receptor
- Chemoprevention
- Chemotherapy
- Chest film
- Chest pain
- Chest X-ray
- Chickenpox definition - Healthy Kids and Pediatrics - health and medical information produced by doctors
- Chickenpox immunization
- Children's immunizations
- Chiropractic
- Chiropractor
- Chlamydia
- Cholecystitis
- Cholesterol
- Cholesterol, definition - Cholesterol information produced by doctors for patients experiencing high cholesterol levels
- Cholesterol, "good" definition - Cholesterol information produced by doctors for patients experiencing high cholesterol levels
- Cholesterol, HDL definition - Cholesterol information produced by doctors for patients experiencing high cholesterol levels
- Cholesterol, LDL definition - Cholesterol information produced by doctors for patients experiencing high cholesterol levels
- Chondroplasia
- Chondrosarcoma
- Chordae tendineae
- Chordoma
- Chorion
- Chorionic gonadotropin, human
- Chorionic villus sampling
- Chromatids
- Chromosomes
- Chromosome complement
- Chromosome disorder
- Chromosome map
- Chromosomes in multiple miscarriages
- Chronic
- Chronic arthritis, systemic-onset juvenile
- Chronic fatigue syndrome
- Chronic illness
- Chronic leukemia
- Chronic phase
- Chronicity
- Circulation