6-Benign Neoplasms of Bone

Question 1

What is Exostosis?

Answer 1

localized proliferation of bone that arises from cortical plate in a single or multiple sites (sporadic)

Question 2

What are some site specific Exostosis?

Answer 2

Tori
Torus palatinus
Torus mandibularis

Question 3

Where does Exostosis usually occur?

Answer 3

Mx or Md alveolar ridge bilaterally

Md = lingual premolar

Question 4

What occurs because of Exostosis?

Answer 4

ulcerate easily

Question 5

What is an Osteoma?

Answer 5

localized proliferation of bone

Question 6

Where does Osteoma usually occur?

Answer 6

craniofacial skeleton

rarely outside of head

Question 7

Osteomas may be a manifestation of what disease?

Answer 7

Gardner’s Syndrome

Question 8

What is Gardner’s Syndrome? (Will ask this on boards)

Answer 8

autosomal dominant disorder
multiple osteomas in jaw, Md in particular
multiple ademonatous polyps of colon and rectum

Question 9

What does Gardner’s Syndrome cause?

Answer 9

colon cancer

100% incidence of malignant transformation

Question 10

What is Chondroma?

Answer 10

benign neoplasm of cartilage, 20-40 y/o, exceedingly rare in head/neck region

Question 11

Most lesions diagnosed as Chondromas are really what?

Answer 11

low grade chondrosarcomas

Question 12

What is an Osteoid Osteoma?

Answer 12

rare neoplasm of bone

usually less than 30 and males 2:1

Question 13

Osteoid Osteoma clinical presentation (on boards)?

Answer 13

nocturnal pain relieved by aspirin

Question 14

Osteoid Osteoma radiographic appearance?

Answer 14

small lesion
looks like a target
central opacity
peripheral halo

Question 15

What is Osteoblastoma?

Answer 15

rare neoplasm of bone in craniofacial skeleton
Md most common
Males

Question 16

Osteoblastoma clinical presentation?

Answer 16

Pain
not nocturnal
not relieved by aspirin

Question 17

Osteoblastoma radiographic appearance?

Answer 17

large lesion
significant expansion
well-defined or ill-defined
peripheral corticated
calcified core