1]), absent sternebra, incomplete ossification of xiphoid process and increased distance between hamulus and basisphenoid
(1000 mg [kg.
The characteristic imaging feature of an osseous stalk arising from the basisphenoid
portion of the clivus may help make the proper diagnosis and guide treatment.
The ossification is observed in the medial and posterior regions of the basal plate, which correspond to basisphenoid
, basioccipital and exoccipital.
Rostrally it articulates with the caudal edge of the palatine and caudally with the basisphenoid
bearing bilateral posterolateral rami contacting prootic.
The skull is strongly depressed; the basisphenoid
is elongate, triangular, much broader behind; the basioccipital is extremely narrow and elongate (Gray 1872a).
Ventral process of basisphenoid
rudimentary, not reaching to paraspheniod; basisphenoid
with a small pore between it and basis crania.
First ossification of Dentary Premaxilla Maxilla Frontal Jugal Parietal Squamosal Alisphenoid Basioccipital Basisphenoid
Exoccipital Periotic Other skeletal elements Membrane bones approach midline Cartilage in basioccipital region Closure of secondary palate First appearance of tooth buds Differentiation of malleus and incus Differentiation of condylar cartilage Joint capsule at dentary-squamosal joint Muscle First alignment of myoblasts (tongue) First appearance of striations Craniofacial muscles distinguishable Central nervous system Evagination of telencephalon Differentiation of pigment in retina Connections between olfactory nerve and epithelium Layering in cortex Swelling of thalamus and hypothalamus Primary lens cells fill lens vesicle
Three age classes were assigned on the basis of ventral braincase suture closures between the basioccipital and basisphenoid
, and between the basisphenoid
and presphenoid (Figure 2).
18###Vertical external height of braincase (from midline of basisphenoid
to summit of supraoccipital)###114.
We also scored discrete mandibular and cranial characters identified by Ruedas (1998) to distinguish robustus and chapmani, including the basisphenoid
foramina, tympanic process, and mental foramen.
16) Nicolai et al reviewed the cases of 15 patients who underwent endoscopic surgery for juvenile angiofibroma, including 4 who had modified Fisch stage III disease; they emphasized the importance of drilling out the pterygoid canal to explore the basisphenoid