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A 44-year-old woman presented with abdominal pain and was discovered to have a retroperitoneal/pelvic mass which was resected, along with several lymph nodes. The retroperitoneal mass measured 8.0 x 3.5 x 3.0 cm and had a hemorrhagic cut surface. The lymph nodes were enlarged and the cut surface had a similar appearance to the pelvic mass. A hysterectomy and bilateral salpingo-oophorectomy was performed at the same time which was essentially unremarkable except for adenomyosis. Immunohistochemical stains performed on the retroperitoneal mass demonstrated actin (+), HMB-45 (+) and ER (+).
The master list with the correct answer
• Kaposi sarcoma
• Leiomyosarcoma
• Lymphangioleiomyomatosis
• Peritoneal leiomyomatosis
• Vascular transformation of sinuses (lymph node)
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