This atlas uses the International statistical classification of diseases and related health problems. - 10th revision, 10th revision (ICD-10) and the Royal College of Paediatrics and Child Health (RCPCH) extension for coding of congenital anomalies. This atlas provides selected illustrations and photographs of congenital anomalies that are severe enough to have a high probability of being captured during the first few days following birth. Also, because of their severity and frequency, these depicted conditions have significant public health impact, and for some there is a potential for primary prevention. When used in conjunction with the manual, the illustrations and photographs will help the reader to identify an initial list of congenital anomalies to consider for monitoring; describe the tools needed to define and code identified cases and define specific congenital anomalies under surveillance.

Congenital anomalies, also known as birth defects, are structural or functional abnormalities, including metabolic disorders, that are present from birth. Congenital anomalies are a diverse group of disorders of prenatal origin that can be caused by single gene defects, chromosomal disorders, multifactorial inheritance, environmental teratogens or micronutrient malnutrition.