Follow-up immunohistochemistry was performed with pan-cytokeratin (CK AE1/AE3) and epithelial cell adhesion molecule (BerEp4) to prove the epithelial component, melan-A and human melanoma black 45 (HMB-45) to prove the melanocyte component, and proliferative index (Ki-67) to underline the benign nature of the tumor. This evidence concerns the gene MKI67 and neoplasm.