[Plasmocytoma of the orbit (author's transl)]

After a survey of the clinical picture of plasmcytoma including histological, internal and radiological findings the special aspects of affections of the orbit are described and demonstrated by four own cases since 1955. The authors propose the differentiation between plasmocytomas with bony erosive changes, solitary or multiple, and extrameudllary myeloma for theapeutical and prognostical reasons. The extramedullary myeloma of the orbit has a better prognosis and should be treated by local excision of the tumor with following radiation (CO-60). In case of bony erosive changes the extension of the tumor has to be considered, in case of multiple involvement of the body the radiation should be prefered as a palliative treatment in combination with chemotherapy.