Since a small amount of silica is present in coal-mine dust, it was long assumed that CWP represented a form of silicosis, but this is not usually the case.

• 由于煤矿粉尘含少量的二氧化硅结晶，故煤尘肺曾经在很长一段时间内被当作是硅肺的一种亚型，但实际上两者是不同的。