[Cryptogenetic osteolysis of the mandible (author's transl)]

A case of "cryptogenetic osteolysis of the mandible" is reported. This is a rare affection as only 13 cases of "phantom mandible" are known, but other sites exist (91 cases of phantom bone are known). The diagnosis is suspected after radiography, and confirmed by anatomopathological examination. No treatment for this affection has been described.