Evans Scott E, Ost David E
Department of Pulmonary Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA.
Curr Opin Pulm Med. 2015 May;21(3):260-71. doi: 10.1097/MCP.0000000000000156.
Pneumonia is the leading cause of death among neutropenic cancer patients, particularly those with acute leukaemia. Even with empiric therapy, case fatality rates of neutropenic pneumonias remain unacceptably high. However, recent advances in the management of neutropenic pneumonia offer hope for improved outcomes in the cancer setting. This review summarizes recent literature regarding the clinical presentation, microbiologic trends, diagnostic advances and therapeutic recommendations for cancer-related neutropenic pneumonia.
Although neutropenic patients acquire pathogens both in community and nosocomial settings, patients' obligate healthcare exposures result in the frequent identification of multidrug-resistant bacterial organisms on conventional culture-based assessment of respiratory secretions. Modern molecular techniques, including expanded use of galactomannan testing, have further facilitated identification of fungal pathogens, allowing for aggressive interventions that appear to improve patient outcomes. Multiple interested societies have issued updated guidelines for antibiotic therapy of suspected neutropenic pneumonia. The benefit of antibiotic medications may be further enhanced by agents that promote host responses to infection.
Neutropenic cancer patients have numerous potential causes for pulmonary infiltrates and clinical deterioration, with lower respiratory tract infections among the most deadly. Early clinical suspicion, diagnosis and intervention for neutropenic pneumonia provide cancer patients' best hope for survival.
肺炎是中性粒细胞减少的癌症患者(尤其是急性白血病患者)的主要死因。即便采用经验性治疗,中性粒细胞减少性肺炎的病死率仍高得令人难以接受。然而,中性粒细胞减少性肺炎管理方面的最新进展为改善癌症患者的预后带来了希望。本综述总结了近期有关癌症相关性中性粒细胞减少性肺炎的临床表现、微生物学趋势、诊断进展及治疗建议的文献。
尽管中性粒细胞减少的患者在社区和医院环境中均可感染病原体,但患者因医疗需要而接触病原体,导致在基于传统培养的呼吸道分泌物评估中频繁发现多重耐药菌。现代分子技术,包括更广泛地使用半乳甘露聚糖检测,进一步有助于真菌病原体的鉴定,从而能够采取积极干预措施,这似乎可改善患者预后。多个相关学会已发布疑似中性粒细胞减少性肺炎抗生素治疗的更新指南。促进宿主对感染反应的药物可能会进一步增强抗生素的疗效。
中性粒细胞减少的癌症患者肺部浸润和临床恶化有多种潜在原因,其中下呼吸道感染最为致命。对中性粒细胞减少性肺炎进行早期临床怀疑、诊断和干预是癌症患者生存的最大希望。