[A new classification of so-called benign tumors of the bone based on their association with visceral pseudo-tumors].

The combination of benign pseudo-tumors of the bone and visceral lesions are relatively frequent for chondromas, osteomas, fibromas and angiomas, which suggests for this group a pathogenic relationship between the bone lesions and others (dyschromias, endocrinian tumors, leiomyomas, naevus and gliomas) and a common dysembryoplasic origin. In contrast to these " bone hamartomas " there are pseudo-tumoral reactions where associations are exceptional. Also, there are slow tumors, a typical one being the myeloplaxis tumor. This logical classification makes it possible to better understand the pathogeny, the development and the prognosis of the disparate lesion generally described as " benign tumors of the bone ".