The immunohistochemistry showed a typical mesothelial profile (positive for calretinin, WT-1, D2-40; negative for CEA, Ber-Ep4), as described in large series and emphasizing the value of a broad mesothelial panel and directed carcinoma-exclusion markers in avoiding diagnosis pitfalls in paratesticular disease [8-11]. The gene discussed is CALB2; the disease is carcinoma.