侯××,男,26岁,主因间断低烧,右肺阴影半年于1997年5月5日入院。发病时发烧、乏力,按感冒治疗症状曾一度好转。但仍有间断低烧,咳嗽无痰。后于外院拍胸片发现右下肺阴影,抗感染及抗结核治疗无好转。入院前行纤维支气管镜检查,印象为“右下 Hou ××, male, 26 years old, mainly due to intermittent low-grade fever, right lung shadow was admitted to the hospital on May 5, 1997. Fever and fatigue occurred at the time of onset. Symptoms of treatment by colds once improved. However, there are still intermittent low-grade fever and cough without sputum. After taking a chest radiograph in the outer court, the shadow of the right lower lung was found. There was no improvement in anti-infection and anti-tuberculosis treatment. Fiberoptic bronchoscopy before admission, with the impression of "lower right