Like myeloma, solitary plasma-cytomas often produce an bnormal protein and the disappearance of this protein can be used to check on the success of treatment and to screen for any reappearance of the disease. The outlook depends very much on where the plasmacytoma is found. If it occurs outside the bone in soft tissues then the outlook is good and it is usually possible to eradicate the disease with localised radiotherapy. Most cases occurring within the bone will respond well to localised radiotherapy. There is no evidence that current drug treatments will reduce the likelihood of eventually developing myeloma.
Prognosis See above.