My mom was diagnosed with a plasmacytoma but now has to have further testing to rule out multiple myeloma. The only thing I know so far is that all of her labs are normal, the MRI only showed the area of the plasmacytoma as did the bone scan. Other than the back pain at the area of the spine where the plasmacytoma is, she is completely asymptomatic. I'm overwhelmed. Anybody know anything about plasmacytomas?