Kemps Kemps Kemps ALK-positive histiocytosis: a new clinicopathologic spectrum highlighting neurologic involvement and responses to ALK inhibition ALK-positive histiocytosis: a new clinicopathologic spectrum highlighting neurologic involvement and responses to ALK inhibition Blood Blood 2022 2022 139 139 2 2 256 256 280 280 10.1182/blood.2021013338 10.1182/blood.2021013338 supplied-pmid 34727172? This evidence concerns the gene ALK and Histiocytosis.