A<unk>  results when a lung laceration, a cut or tear in the lung tissue, fills with air. A rupture of a small airway creates the air-filled cavity. Pulmonary lacerations that fill with blood are called pulmonary hematomas. In some cases, both<unk> s and hematomas exist in the same injured lung. A<unk>  can become enlarged, for example when the patient is mechanically ventilated or has acute respiratory distress syndrome, in which case it may not go away for months. Intraosseous pneumatocysts in the bone are rare and of unclear origin. They are benign and usually without symptoms. They are also found around a sacroiliac joint, and there has been one reported case of an acetabular pneumocyst.
Pneumatocele
Hematocele
Varicocele
Hydrocele
Urethrocele
Spermatocele
Inguinal hernia
Hydrocele testis