卡氏肺孢子虫肺炎是艾滋病患者最常见的机会感染。常见的x线表现是弥漫性肺实质浸润。患者通常有发热、干咳及呼吸困难。近来报道的非典型x线类型包括上叶局部浸润、孤立性肺结节及空洞性结节。非典型x线表现见于戊烷脒雾化吸入治疗卡氏肺孢子虫肺炎患者中。本例表现为肺门肿块及空洞,出现于长期吸入戊烷脒气溶胶后。 Pneumocystis carinii pneumonia is the most common opportunistic infection in AIDS patients. Common x-ray manifestations of diffuse pulmonary parenchymal infiltration. Patients usually have fever, dry cough and difficulty breathing. Recently reported atypical x-ray types include upper lobe local infiltration, solitary pulmonary nodules and hollow nodules. Atypical x-ray findings are seen in pentamidine inhalation therapy in patients with Pneumocystis carinii pneumonia. This case showed hilar mass and cavity, appeared after long-term inhalation of pentamidine aerosol.