Assertion: periosteum's layer | /r/HasAspect | irregular surface
Facets:
Source sentences:
text: These variants include one or more layers of bone parallel to the surface of the underlying bone; another variant has layers of bone but these layers occur at the margin of a more active focus of bone formation that has elevated the periosteum forming triangular layers (Codman's triangle), a thick layer of bone that has an irregular surface, long, thin spicules of bone that are perpendicular to the underlying cortex, and long, thin spicules that form a sunburst orientation relative to the underlying bone surface.