Abstract
Late-onset noninfectious pulmonary complications (LONIPCs) are life threatening for allogeneic hematopoietic SCT (allo-HSCT) recipients. However, the impact of LONIPCs on survival has not been properly evaluated and little is known about treatment efficacy. We retrospectively investigated 290 allo-HSCT recipients in our institute and reviewed the clinical aspects of 44 patients who had been diagnosed with LONIPCs. LONIPCs were significantly associated with higher rates of chronic GVHD (P<0001) and nonrelapse mortality (P=0.013), and lower rates of relapse (P=0.009). As a result of these effects, OS was significantly worse in those with LONIPCs (P=0.003). This result differs from a previous report. We then assessed short-term treatment response and final outcome. These results were defined by radiological findings, subjective symptoms, oxygen requirement and survival. Use of inhaled and systemic steroids did not affect either short-term response or final outcomes. However, administration of systemic corticosteroids earlier than at 21 days (median interval of time from onset of symptoms to systemic corticosteroids administration) was associated with a better outcome (P=0.054 for short-term response, and 0.016 for final outcome). Our study indicates that LONIPCs reduce OS, and early intervention with systemic corticosteroids may be effective.
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