Immunohistochemistry was performed as described earlier in a two-step staining method by a Techmate 500 immunostainer (DAKO).10 (link) Antibodies used from DAKO were as follows: cytokeratin proteins (clone AE1-AE3), vimentin (V9), desmin (D33), smooth muscle actin (1A4), muscle-specific actin (HHF35), S-100 (#GA504), melanosome (HMB45), CD31 (JC0A), CD34 (QBEnd), CD68 (KP1), CD3 (#GA503), CD20 (L26), CD45LCA (2B11+PD7/26), estrogen receptor (EP1), progesterone receptor (PgR636), factor VIII (#GA527), Ki67 (MIB-1), kappa chain (#GA506), gamma chain (#GA512), calretinin (DAK-Calret 1), WT1 (6F-H2), epithelial membrane antigen (E29), Myogenin (clone F5D), smooth muscle actin (1A4) and E-cadherin (NCH38).