Solitary plasmacytoma of the skull: report of two cases.

We report two cases of solitary plasmacytoma of the skull, a very unusual presentation and location of this tumor. There seems to be no difference in prognosis between the tumor originating from the skull (osseous form) and from the dura mater (non-osseous form), differently from the data of other parts of the body. The risk of secondary multiple myeloma appears to be low but the mean follow-up is too short for any conclusion on this point.