[Intraosseous ganglion (author's transl)].

The intraosseous ganglion must be always included in the differential diagnosis of cystic epiphysial bone lesions, which are localised in the vicinity of a joint, especially since this bone disease can be succesfully operated on. The preoperative diagnosis can be established with the help of conventional and tomographic x-rays examination. A communicating chanel, which is recognizable in tomographic cuts as a lucent line between the ganglion and a joint, is a pathognomic finding. The interpretation of the radiological symptoms can be difficult in those cases in which the lesions are not yet well developed or in which concomitant degenerative joint changes are present.