The World Health Organization (WHO) has classified the ALCL into three major entities, primary systemic (in lymph nodes or organs throughout the body at presentation) ALK(+) (Anaplastic Lymphoma Kinase-positive) ALCL, primary systemic ALK(−) ALCL, and primary cutaneous (skin-only involvement without systemic dissemination at presentation). Here, ALK is linked to anaplastic large cell lymphoma.