ALK and anaplastic large cell lymphoma: The history of ALK-negative anaplastic large cell lymphoma was the same as ALK-positive anaplastic large cell lymphoma until 1994, when Stephan Morris, Thomas Look, and colleagues at Saint Jude Children’s Hospital in Memphis identified the genes involving the chromosomes, such as the chromosomal precise location for chromosomes at t2 and t5, the short arm of the chromosome at p23, and the long arm of the chromosome at q35.