CA9 and anaplastic large cell lymphoma: We compared the concentrations of CA9, CD30, and a panel of 12 cytokines in 22 BIA-ALCL seroma samples and 13 benign samples, including 5 bilateral seromas from five patients using ELISAs for CA9 and CD30 and a Biolegend Human 12-plex T helper (Th) Cytokine Panel as previously reported [11].