Cementoma-like tumours of bone.

The authors summarize the morphological findings on cementoma-like fibromas of long bones registered at the Reference Centre for Bone Tumours in Brno or referred to it. One of the cases registered is described in detail from the submicroscopic point of view. Their experience has shown that cementoma-like fibromas of long bones are genuine bone tumours sui generis, differing to some extent from cementomas of the jaws. The cementicles in such tumours are identical to acellular dental cement and structurally quite different from osteoid.