skull base tumors

Question 1

what are the three main bone types of th developing skull

Answer 1

membranous neurocranium- flat bones of the skullt
cartilagenous neurocranium (endocondral ossification)- base of the skull
viscerocranium- face development

Question 2

anterior skull base deverloped from

Answer 2

neural crest cells

Question 3

the posterior skull base developed from

Answer 3

paraxial mesoderm

Question 4

what separates the anterior and posterior skull base

Answer 4

the sella

Question 5

age of skull base maturation

Answer 5

midline cranial base 7.7 years- followed be lateral skull base 11.7 years and lastly the face 15.7 years

Question 6

age of pneumitization

Answer 6

ethmoid and maxillary by age 3, frontal age 7 and pneumatized by age 12

Question 7

sella penuratized

Answer 7

beggins age 2, with 6 to 7 planum and anterior wall 77% pnumatized, superior clivus not until age 10

Question 8

when is intracaratid distance normalized

Answer 8

9-10

Question 9

where do chordomas classically presnts

Answer 9

the clivis