This chapter on paediatric surgery covers procedures performed from fetus to 16 years of age. The wide range is succinctly covered with appropriate detail for both those looking to apply for medicine, and those in medical school. The chapter reviews oncological conditions, most importantly, leukaemia. It also studies common conditions such as abdominal pain, hernia, undescended testicles, and appendicitis. Surgical management of gastrointestinal illnesses such as pyloric stenosis, intussusception, and Hirschsprung’s disease is covered along with urological conditions such as hypospadias. It also discusses important neonatal presentations of necrotizing enterocolitis and gastrointestinal atresia, to name a few.