Lorlatinib overcomes alectinib‐induced hemolytic anemia in an <scp>ALK</scp> fusion positive non‐small‐cell lung cancer patient with severe tumor‐associated liver failure: A case report

Hemolytic anemia is a rare and unique complication of alectinib, not observed with other anaplastic lymphoma kinase (ALK) inhibitors. Here, we present a case of an ALK fusion-positive non-small-cell lung cancer (NSCLC) patient who developed liver failure due to diffuse liver metastasis at initial diagnosis. Treatment was initiated with low-dose alectinib, but the patient developed severe hemolytic anemia. Switching to lorlatinib allowed for the continuation of ALK inhibitor therapy and successful tumor reduction. ALK inhibitors are crucial for ALK fusion-positive NSCLC patients. Managing severe side effects by switching medications is essential to maintain effective therapy. In this case, lorlatinib effectively controlled the tumor and improved the patient's liver function and performance status. This case highlights the importance of adapting treatment strategies to manage adverse effects while ensuring the continued use of ALK inhibitors for optimal patient outcomes.