Objective: To probe into the clinical manifestations

diagnosis and treatment of Mycoplasma pneumoniae pneumonia complicated with pulmonary embolism. Methods: Retrospective analysis was conducted on clinical characteristics and diagnosis and treatment of one child with Mycoplasma pneumoniae pneumonia complicated with pulmonary embolism. Results: During the anti-infection treatment

the child developed chest pain and hemoptysis. D-dimer was >20 mg/L. After examination

it was confirmed that there was pulmonary embolism

and after treatment with anti-infection

hormone suppression of inflammatory response

low molecular weight heparin calcium and aspirin anticoagulation

the symptoms of the child were improved significantly. And D-dimer decreased to 1.1 mg/L. Follow-up review of chest CTA showed no signs of pulmonary embolism

and pulmonary lesions were absorbed. Conclusion: Pulmonary embolism may accompanied by chest pain

hemoptysis and D-dimer elevation in children with Mycoplasma pneumoniae pneumonia during treatment. Early diagnosis and actively anticoagulation treatment is the key to obtain better prognosis.