Calmodulin-Binding Proteins/genetics; Gene Fusion; Gene Rearrangement; Oncogene Proteins, Fusion/genetics; RNA-Binding Proteins/genetics; Skin Neoplasms/genetics; Calmodulin-Binding Proteins/metabolism; Gene Expression Regulation, Neoplastic; Histiocytoma, Malignant Fibrous/genetics; Histiocytoma, Malignant Fibrous/metabolism; Histiocytoma, Malignant Fibrous/pathology; Humans; In Situ Hybridization, Fluorescence; Myoepithelioma/genetics; Myoepithelioma/metabolism; Myoepithelioma/pathology; Neuroectodermal Tumors, Primitive/genetics; Neuroectodermal Tumors, Primitive/metabolism; Neuroectodermal Tumors, Primitive/pathology; Oncogene Proteins, Fusion/metabolism; RNA-Binding Protein EWS; RNA-Binding Proteins/metabolism; Sarcoma, Clear Cell/genetics; Sarcoma, Clear Cell/metabolism; Sarcoma, Clear Cell/pathology; Sarcoma, Ewing/genetics; Sarcoma, Ewing/metabolism; Sarcoma, Ewing/pathology; Skin Neoplasms/metabolism; Skin Neoplasms/pathology; Soft Tissue Neoplasms/genetics; Soft Tissue Neoplasms/metabolism; Soft Tissue Neoplasms/pathology