RT Book, Section A1 Gomella, Tricia Lacy A1 Eyal, Fabien G. A1 Bany-Mohammed, Fayez SR Print(0) ID 1168357540 T1 Common Multiple Congenital Anomalies: Syndromes, Sequences, and Associations T2 Gomella's Neonatology: Management, Procedures, On-Call Problems, Diseases, and Drugs, 8e YR 2020 FD 2020 PB McGraw-Hill Education PP New York, NY SN 9781259644818 LK accesspediatrics.mhmedical.com/content.aspx?aid=1168357540 RD 2024/04/18 AB A congenital anomaly (also called birth defect, congenital malformation, or congenital abnormality) is defined as a structural or functional defect that is present at birth and different from what is considered normal. A structural defect is an abnormality in the structure of the parts of the body (skeleton and organs). Structural defects most often occur during the critical period of fetal development in the first trimester. Structural defects include heart defects, cleft palate, neural tube defects, club foot, and others. A functional defect is defined as a defect in how the body system works (eg, metabolic disorders, brain and nervous system problems, degenerative disorders, immune disorders, sensory disorders). This chapter will discuss only structural defects; functional defects are discussed elsewhere.