Does pectus excavatum hurt?

Written by Zhang Zhi Gong

Cardiothoracic Surgery

Updated on January 20, 2025

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The sternum of pectus excavatum caves inward and backward, directly compressing the patient's heart or lungs, causing a certain degree of chest pain. This chest pain is not caused by pectus excavatum itself, but by the compression of the heart or lungs due to pectus excavatum. Imagine a normal ribcage as an oval shape; its cross-section is also oval and is a ratio of the patient's left-right diameter, transverse diameter, and anterior-posterior diameter. In normal individuals, this ratio is less than 2.5. In pectus excavatum, since the anterior-posterior diameter is significantly reduced and the sternum is markedly pressed towards the spine, the patient's heart is entirely compressed and deformed. Therefore, the patient's coronary arteries or valves may be squeezed and deformed, resulting in about 60% of pectus excavatum patients experiencing chest pain.

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Written by Zhang Zhi Gong

Cardiothoracic Surgery

1min 8sec

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Does pectus excavatum require surgery?

The decision on whether surgery is needed for pectus excavatum depends on the patient's age, the severity of the deformity, and the elasticity of the chest wall. If the patient is very young, under one year old, and the pectus excavatum is not very severe, we recommend a watchful waiting approach. In patients with pectus excavatum under one year old, it is possible that the condition is pseudopectus excavatum, which may improve as they grow and develop within the first year. However, not everyone improves, with about one third of the cases showing improvement within the first year. If the child is older than one year, the likelihood of improvement is basically none, and at this time, conservative treatment using a pectus excavatum suction cup can be considered. If adhered to effectively, the suction cup can have a certain effect for some patients with pectus excavatum. But if the patient is over three to five years old and the chest wall has matured, surgery should be considered. Therefore, for the vast majority of patients with pectus excavatum, surgery is a relatively definitive and immediately effective method.

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Written by Zhang Zhi Gong

Cardiothoracic Surgery

1min 33sec

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How is funnel chest formed?

Regarding the cause of pectus excavatum, there have historically been many hypotheses. For a while, medical experts believed that pectus excavatum was caused by the backward pulling of the diaphragm behind the sternum. Thus, for a time, surgeries abroad involved cutting the portion of the diaphragm behind the depressed area of the chest. Eventually, it was discovered that such cutting did not significantly benefit the treatment of pectus excavatum, and the results were not very conclusive. Therefore, this hypothesis was later debunked. To date, it is generally believed that the primary formation of pectus excavatum is somewhat related to genetic or hereditary factors. Of course, not all cases of pectus excavatum are due to parents having the condition; it might be present in the genes of ancestors and only manifest in the current generation or in this patient. Additionally, pectus excavatum could be associated with other diseases, such as connective tissue disorders. For example, some patients might have congenital diaphragmatic hernias, and after surgical repair, they could be prone to pneumothorax. Furthermore, some patients may suffer from pectus excavatum due to subglottic stenosis and underdeveloped bronchopulmonary structures, possibly triggered by respiratory factors. However, no matter the details, the formation of pectus excavatum is directly or indirectly related to congenital genes or heredity.

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Written by Zhang Zhi Gong

Cardiothoracic Surgery

1min 13sec

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Can funnel chest heal itself?

Most parents and doctors hope that funnel chest can heal on its own, but the truth is that most cases of funnel chest cannot heal spontaneously. Imagine if it's a small sapling that has grown crooked from a young age, already deformed, with the sternum indenting inward and backward. As the chest continues to grow, especially during puberty, the funnel chest will become more and more pronounced. Just like a crooked sapling, if it is not corrected, as it grows, the indentation and deformity will become more prominent. Of course, there is an exception. Some children are found to have funnel chest within the first year after birth, which may be due to the pressure on the sternum from the arms and legs during pregnancy while in the mother's womb. We know that children are curled up in the womb, and this positioning of the arms and legs in front of the chest can also cause compression of the chest cavity, leading to an inward deformity of the sternum. However, after birth, as the arms and legs stretch out and the pressure causing the indentation on the chest is relieved, the deformity of the indented sternum may gradually improve. However, most cases occur before the age of one, and the likelihood of this happening decreases significantly after one year of age.

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Written by Zhang Zhi Gong

Cardiothoracic Surgery

1min 44sec

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Is pectus excavatum scary?

Is pectus excavatum scary? In a normal person, the thoracic transverse diameter and anteroposterior diameter have a normal ratio. For example, in normal individuals, this ratio of the transverse diameter to the anteroposterior diameter is less than 2.5. However, some children, due to congenital or acquired reasons, may have a sternum that is concave inward in the middle. In such cases, the concavity of the sternum significantly reduces the anteroposterior diameter, and the ratio of the transverse to anteroposterior diameter then becomes greater than 2.5. For pectus excavatum where the ratio is between 2.5 and 3.5, we suggest conservative treatment or observation, and a pectus excavatum suction cup can be used. If the ratio is greater than 3.5, the pectus excavatum is very pronounced, and we recommend surgical treatment. In severe cases of pectus excavatum, where the ratio of the transverse to anteroposterior diameter is greater than 4, there are instances where the chest is almost touching the back, with only a few millimeters of space between the anterior chest wall and the spine during surgery. In such severe cases, the heart is completely pushed to the left side of the patient, significantly affecting both cardiac and pulmonary function, impacting the patient’s physical development. In severe cases, it can also cause significant psychological issues, including severe feelings of inferiority, lack of self-confidence, poor social skills, and even severe depression or suicidal tendencies. Therefore, severe pectus excavatum can indeed be quite frightening.

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Written by Zhang Zhi Gong

Cardiothoracic Surgery

1min 3sec

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Pectus excavatum causes

The etiology of pectus excavatum is not fully clear yet, but it has been found that the incidence of pectus excavatum greatly increases among patients with connective tissue diseases, possibly related to the disruption of the balance between growth genes and inhibitory genes affecting the cartilage on both sides of pectus excavatum. Moreover, it is also found that the complication of pectus excavatum significantly increases among patients with Marfan syndrome (also a type of connective tissue disease) and Noonan syndrome. In children with congenital airway stenosis and bronchopulmonary dysplasia, the incidence of pectus excavatum also significantly increases. This suggests that the causes of pectus excavatum are directly or indirectly related to genetics and heredity, and regardless, the causes of pectus excavatum, both acquired and congenital, are directly related to genes and heredity.