1, the effect: if it is early, such as a phase of the treatment is better, if it is late has formed obvious silica nodules, pulmonary fibrosis is less effective. 2.Cost: If small volume lung lavage is used, it is very simple and can be treated on an outpatient basis, so the cost is not much, less than $1000/each time; if large volume whole lung lavage is used, it is necessary to be hospitalized and the operation is done under general anesthesia, including some post-operative treatment, and the cost is generally about $10000. However, the situation varies from place to place, for reference only.