Pulmonary granulomatous inflammation after ceritinib treatment in advanced ALK-rearranged pulmonary adenocarcinoma.

Ceritinib is a new anaplastic lymphoma kinase (ALK) inhibitor that has shown greater potency in patients with advanced ALK-rearranged non-small cell lung cancer, including those who had disease progression in crizotinib treatment. Here we reported, after several months of ceritinib treatment, two patients with advanced ALK-rearranged pulmonary adenocarcinoma exhibited a spectrum of respiratory symptoms like cough and dyspnea, with significantly higher inflammatory indicators. Chest computed tomography (CT) showed multiple bilateral and peripheral lesions in lungs. The prior considerations taken into account were disease progression or infection. However, biopsies of the pulmonary nodules revealed features of granulomatous inflammation without definite cancer cells. We documented for the first time that ceritinib might be associated with pulmonary granulomatous inflammation, and clinicians should be alert to the possibility that the rare adverse event emerged during ceritinib treatment.