Air tumor or Pneumatosis is a rare but serious disease that leads to the appearance of large tumors in the lungs. The causes of the disease are not fully understood, but the main factors are considered to be bacterial infections, parasitic diseases and hereditary predisposition. Diagnosis of an air tumor is based on data from computed tomography of the respiratory tract, bronchoscopy and biopsy. Treatment is based on surgical removal of tumors, chemotherapy and antibiotics.