“…Bortezomib is a proteasome inhibitor successfully used for the therapy of multiple myeloma even in patients with extraosseous disease, now experimented in primary and secondary PCL. In this regard, the information are still limited [14][15][16][17], but recently Musto et al [17] described 12 PCL (8 primary and 4 secondary) treated with bortezomib-containing regimen, obtaining promising results, with an overall response rate of 92% (5 PR, 4 VGPR, 2 CR), and a median survival of 8 months. Despite the use of bortezomib, in our case, the disease rapidly spread, with the involvement of unusual sites.…”