ALK and anaplastic large cell lymphoma: Although the morphologic variants of ALCL are not officially recognized in the ALK- group [1,36], it is still possible to make a diagnosis of ALK- ALCL in cases that have areas with a classic/common morphology adjacent to variant features, namely signet-ring cells, sarcomatoid morphology, or a background rich in neutrophils (“pyogenic-like”) or eosinophils [14,37].