[Solitary plasmacytoma of the upper respiratory and digestive tracts. Report of 3 cases].

Three cases of plasmocytoma of cervicofacial localization are reported and diagnostic and therapeutic methods and prognostic factors reviewed. One patient had localized cervicofacial amyloidosis. A literature review confirmed the rarity of this tumor and its marked oncologic differences from epithelial type tumors and multiple myeloma.