title: Bone islands.
mesh_terms: D015502:Absorptiometry, Photon; D006801:Humans; D007085:Ilium / Q000000981:diagnostic imaging*; D008297:Male; D008875:Middle Aged; D009999:Ossification, Heterotopic / Q000000981:diagnostic imaging*; D012447:Sacrum / Q000000981:diagnostic imaging*