ALK and anaplastic large cell lymphoma: TCLlnc1 expression was then assessed in enlarged serum samples of 138 PTCL patients, including 18 cases of ALK+ALCL, 12 cases of ALK−ALCL, 53 cases of AITL, and 55 cases of PTCL-NOS, as well as in 10 cases of RH and 10 cases of healthy volunteers (HVs).