Diagnostic Approach for DLI: How is DLI Diagnosed?

When diagnosing drug-induced lung injuries, one must always remember that lung injuries can be caused by any drug and that the injuries occur not only during treatment but also after completing a course of treatment. When a new lung lesion emerges, the onset of drug-induced lung injury should be considered, while also differentiating it from the worsening of a pulmonary/pleural lesion that a patient may have already had as an underlying disease and from the opportunistic infections—particularly when the patient has reduced immunity and defense against such infections.