Results every patient had a long course of diseases and abroad pathological changes in lung , had treated by broad-spectrum antibiotics and hormone , clinic symptom wasn 't representative , and aptitudinal to postpone diagnose because it was cover up by the primary affection .

结果所有病例病程较长，肺部病变广泛，有长期反复应用广谱抗生素及激素史，临床表现不典型，易被原发病症状所掩盖而延误诊断。