Pneumatoceles.

Pneumatoceles are air-filled spaces or cavities within the lungs that can develop as a result of various conditions, such as pneumonia, tuberculosis, trauma, or surgery. These cavities are typically thin-walled and can vary in size. In most cases, pneumatoceles are asymptomatic and may resolve on their own without the need for treatment. However, larger or persistent pneumatoceles can cause symptoms such as chest pain, shortness of breath, or coughing. Treatment options for pneumatoceles may include monitoring, drainage, or surgery in severe cases.