- Cough variant asthma
- Congenital tuberculosis
- Congenital pure red cell aplasia
- Congenital hypoparathyroidism
- Congenital hyperinsulinemic hypoglycemia
- Congenital diaphragmatic hernia
- Congenital dacryocystocele
- Congenital bile acid synthesis disorder
- Congenital and infantile nephrotic syndrome
- Clubbed finger
- Childhood constipation
- Child cough
- Cervical lymphadenitis
- Cerebral palsy in children
- Bronchopulmonary sequestration
- Bronchopulmonary dysplasia