A 15-year-old female with a past medical history significant for asthma presented to the emergency department for evaluation of a non-productive cough of one-month duration and an abnormal chest radiograph showing left lung hyper-expansion with mediastinal shift, remodelling of the sternum, and no acute pneumonia. The child had been previously evaluated several times for cough symptoms and treated with anti-allergy medications, cough suppressants and a course of antibiotics. Family history was unremarkable. 

 

Examination

Physical examination was significant for the absence of breath sounds on the left. Routine laboratory investigations were normal. Chest CT scan demonstrated a large, gas-filled, septated lesion occupying a major portion of the left lung with a pronounced rightward mediastinal shift. The lesion showed an internal nodular, lobulated solid focus.

 

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