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Abstract
ROS1 rearrangement has been found in a subset of lung cancer and ROS1-rearranged tumors
are sensitive to ALK kinase inhibitors. This study sought to evaluate the clinicopathological
implications and histomorphological characteristics of ROS1-rearranged tumors, especially
micropapillary and aerogenous spread growth and to investigate the usefulness of ROS1
immunohistochemistry as a diagnostic test for ROS1 rearrangement.