The partial or complete obliteration of the frontal sinus cavity by osteogenesis is, I believe, a hitherto undescribed complication of chronic disease of the frontal sinus.
A chronic infection of the mucosa may spread into the bony walls of the sinus and terminate in osteomyelitis, or osteogenesis, if I may use the latter term to indicate a disease rather than an entity. In osteomyelitis, which is a destructive osteitis, the tissues are overwhelmed and destroyed by the invading organisms, as so notably described by Wilensky,1 Dan McKenzie,2 Furstenberg,3 Mosher4 and others,5 whereas in osteogenesis, which is a proliferative osteitis, the tissues become proligerous to wall off or encapsulate the infecting organisms.
Jonathan Wright stated:6
So far as the bone changes are concerned, the pathological condition is directly related to the normal processes of bone growth in the nose, in its origin, and throughout its