This is a subperiosteal abscess of the frontal bone
where the precipitating infection originates in the frontal sinus and causes a progressive osteomyelitis of the bone.
In the first case, a heavy blow to the frontal bone
smashed the skull of an individual (Figure 7a).
The skin of the frontal bone
, especially around the pedicel, is empowered with the ability to turn into antler.
Then the surface area of each of the sixbony components--the perpendicular plate of the ethmoid bone, the vomer, the sphenoid bone, the nasal process of the frontal bone
, the nasal bone, and the palatine crest--was measured with a transparent grid calibrated in square millimeters, Then we calculated the contributions that each of these bones made to the total osseous surface area and the contribution that the total bony component made to the total chondro-osseous septal surface area.
The frontal bone
and the ethmoid sinus wall were markedly thickened but with no evidence of boney erosions (Fig.
The frontal sinus appears during the second year of life as excavations into the diploe of the frontal bone
Hemangioendothelioma of the frontal bone
in a child.
The posterior part of the frontal bone
is the second most common site.
When unfused, the frontal bone
was rarely preserved; when fused, our results show that it was the second best preserved cranial bone (19.
Congenital diseases that are characterized by a thin frontal bone
cortex--such as McCune-Albright syndrome (5) and osteogenesis imperfecta (6)--can lead to dilation of the frontal sinuses.
Computed tomography (CT) detected a widening of the frontal bone
with osteolytic changes of the cancellous bone of the diploe.
We identified it as being from an adult, probably female, and to consist of the central lower portion of the frontal bone
(FIGURE 2), extending down to just above the nose and including a portion of the top of the left orbit.
Computed tomography revealed an abnormally dilated left frontal sinus occupying the whole left side of the frontal bone
A human frontal bone
, cut from the skull and perforated for attachment or suspension, suggests that non-domestic activity was involved, perhaps as Landa (Tozzer 1941: 131) attests for the 16th-century Yucatan Maya, connected with ancestor veneration.
Magnetic resonance imaging (MRI) identified a 9 X 8 X 7-cm extra-axial lesion in the anterior cranial fossa that had eroded the frontal bone
and the superior orbital wall on the left, extended into the left orbit and the right ethmoid cells, and compressed the frontal lobe (figure 1).