Expression of CD30 has also been reported on malignant tumors of nonlymphoid origin, including testicular embryonal carcinoma [14–16], lung adenocarcinoma and mesothelioma [17], mesenchymal tumors [18], granulocytic sarcoma [19], mastocytosis [20], and acute myelogenous leukemia [21]. Here, TNFRSF8 is linked to mesothelioma.