Across PTCL subtypes, systemic ALCLs universally express CD30 in membrane and golgi patterns, while approximately 50% of non-ALCL subtypes, including PTCL, NOS, AITL, ENKTL, ATLL, EATL, and HSTL, express CD30 at variable levels. This evidence concerns the gene TNFRSF8 and adult T-cell leukemia/lymphoma.