Perivascular Epithelioid Cell Neoplasms/pathology; Uterine Neoplasms/pathology; Actins/metabolism; Adenocarcinoma, Clear Cell/metabolism; Adenocarcinoma, Clear Cell/pathology; Adult; Carcinoma, Renal Cell/metabolism; Carcinoma, Renal Cell/pathology; Desmin/metabolism; Diagnosis, Differential; Endometrial Stromal Tumors/metabolism; Endometrial Stromal Tumors/pathology; Female; Follow-Up Studies; Humans; Hysterectomy; Leiomyoma, Epithelioid/metabolism; Leiomyoma, Epithelioid/pathology; Melanoma/metabolism; Melanoma/pathology; Melanoma-Specific Antigens/metabolism; Perivascular Epithelioid Cell Neoplasms/metabolism; Perivascular Epithelioid Cell Neoplasms/surgery; Receptors, Progesterone/metabolism; Uterine Neoplasms/metabolism; Uterine Neoplasms/surgery; Vimentin/metabolism; gp100 Melanoma Antigen