Diagnosis can be made using chest X-ray; the lesion shows up as a small, round area filled with air. Computed tomography can give a more detailed understanding of the lesion. Differential diagnoses – other conditions that could cause similar symptoms as<unk>  include lung cancer, tuberculosis, and a lung abscess in the setting of hyper IgE syndrome (aka Job's syndrome), as a complication of COVID-19 pneumonitis, or on its own, often caused by Staphylococcus aureus infection during cystic fibrosis.
Pneumatocele
Hematocele
Varicocele
Hydrocele
Urethrocele
Spermatocele
Inguinal hernia
Hydrocele testis