Also known as ‘funnel chest’...
Pectus excavatum is a rare condition causing the breastbone to be sunken rather than level with the ribs, so the middle of the chest looks ‘caved in’.
It affects one in 1,000 children and is four times as common in boys as in girls. It’s thought that it may be caused by the cartilage in the ribcage overgrowing and can appear as a symptom of Marfan syndrome and sometimes alongside scoliosis. It can also run in families.
Treatment isn’t always necessary but if the condition is affecting lung function or causing emotional distress, surgery may be beneficial.