[Topography of orbital lymphomas (author's transl)].

In 15 cases of orbital lymphoma topographic characteristics are demonstrated by contact B-scan ultrasonography as follows: The tumour is only infiltrating some single structures of the orbit as muscles. Tenon's membrane, lacrimal gland and the peripheral orbital space. Such enables the examiner, to take an excision exact in this point, where the tumour is located. The problems in differentiating lymphomas from other pseudotumours and from sarcomas by echography are discussed.