Skull Diseases

Question 1

What is McCune Albright syndrome?

Answer 1

unilateral polyostotic disease with endocrinopathy

Question 2

What is the McGregor Line?

Answer 2

line from the hard palate to the most caudal portion of the occipital curve, odontoid tip should be < 4 mm above the line

Question 3

What is the McRae line?

Answer 3

foramen magnum diameter 35 ± 4 mm

Question 4

What is the Chamberlin line?

Answer 4

diagonal line from the hard palate to the posterior foramen magnum, the odontoid should not have ⅓one third of its length above it

Question 5

What is platybasia?

Answer 5

Flattened skull base with an increased angle of the clivus to the spine or clivus to the anterior fossa > 135 degrees

associated with basilar invagination and Chiari malformation

Question 6

What are wormian bones? When are they seen?

Answer 6

Small intrasutural bones, usually in the lambdoid suture

seen with cleidocranial dysostosis, cretinism, osteogenesis imperfecta, chronic hydrocephalus, and as a normal variant

Question 7

Foramen magnum lesions typically cause weakness in what pattern?

Answer 7

ipsilateral UE -> ipsilateral LE -> contralateral LE -> contralateral UE

Question 8

Honeycomb pattern with radiating spicules in the skull is associated with ____.

Answer 8

hemangioma