NPM1 and anaplastic large cell lymphoma: While the NPM1::ALK fusion accounts for 90% of ALK‐positive ALCL in children and adolescents,4, 5, 14 more than 20 variant (i.e. non‐NPM1) ALK fusion partners have been reported, with TPM3 and ATIC accounting for two‐thirds of the variant partner genes.15