Does anyone know anything about leiomyosarcoma?

My mom was recently diagnosed with leiomyosarcoma after a lump in her breast was biopsied. She had it removed and before she starts radiation therapy, she was sent for a CT scan. It was all clear except for some spots on her liver. According to the doctor these were normally not malignant and she said they would... show more My mom was recently diagnosed with leiomyosarcoma after a lump in her breast was biopsied. She had it removed and before she starts radiation therapy, she was sent for a CT scan. It was all clear except for some spots on her liver. According to the doctor these were normally not malignant and she said they would do a follow up CT scan in a couple of months. Does this seem odd? I mean, shouldn't they biopsy the spots now just to be sure. Her cancer is slow growing, but if these spots were malignant it seems it would be better to know now. If you've had any experience with this disease please respond. This has been very hard to deal with and I need any advice I can get.
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