Most cases of SPB progress to multiple myeloma within 2–4 years of diagnosis, but the overall median survival for SPB is 7–12 years. 30–50% of extramedullary<unk>  cases progress to multiple myeloma with a median time of 1.5–2.5 years. 15–45% of SPB and 50–65% of extramedullary<unk>  are disease free after 10 years.
Plasmacytoma
Astrocytoma
Oligoastrocytoma
Retinoblastoma
Histiocytoma
Osteoblastoma
Pineocytoma
Ameloblastoma