How common is plastic bronchitis among children with Mycoplasma pneumonia infections?

Plastic bronchitis is a serious condition where hardened mucus casts form in the airways. It is a known but uncommon complication of Mycoplasma pneumoniae pneumonia (MPP) in children. While it is not the most common outcome of this infection, specific risk factors can help doctors identify which patients are more likely to develop it.

What the research says

One large study analyzed 1,169 children with Mycoplasma pneumoniae pneumonia who underwent bronchoscopy. Out of these, 133 children were found to have plastic bronchitis. This means that among the children in that specific group who had the procedure, about 11% had the condition ⁴.

Other research has focused on identifying who is at higher risk rather than just counting total cases. A study of 205 hospitalized children found that 52 of them, or 25.4%, developed plastic bronchitis ³. This higher percentage suggests that children who are already very sick and require hospitalization may be more likely to develop this complication.

Researchers have also identified specific signs that predict the condition. These include high levels of inflammation markers like C-reactive protein and lactate dehydrogenase, as well as the presence of fluid around the lungs ³⁵⁶. Another study using machine learning on 307 patients confirmed that children with plastic bronchitis showed significant abnormalities in inflammation and nutrition compared to those without the condition ².

What to ask your doctor

• What specific lab results, such as C-reactive protein or lactate dehydrogenase, should I monitor for my child?
• Has my child developed signs like decreased breath sounds or fluid around the lungs that might indicate plastic bronchitis?
• Are there any warning signs of plastic bronchitis I should watch for at home while my child recovers from pneumonia?
• What treatments are available if my child develops plastic bronchitis?