Deck 8: Neoplasms of the Bones of the Mandible and Maxilla

Question 1

All of the following statements about cystic ameloblastoma are true EXCEPT:

A) It occurs in individuals under age 20.
B) It does not cause significant jaw expansion.
C) It may mimic a dentigerous cyst.
D) It may be associated with an unerupted tooth.

Answer 1

It does not cause significant jaw expansion.

Question 2

All of the following statements about osteomas are true EXCEPT:

A) They are comprised of mature bone.
B) They are rarely seen outside bones of the head and neck.
C) They are considered premalignant.
D) They are well-circumscribed radiopacities.

Answer 2

They are considered premalignant.

Question 3

Which of the following describes the radiographic appearance of a complex odontoma?

A) Radiolucent follicular sac-like structure filled with tiny toothlets
B) Well-circumscribed unilocular radiolucency adjacent to the maxillary sinus
C) Radiodense structure with a radiolucent rim and no identifiable toothlets
D) Unilocular radiolucency associated with crown of an unerupted tooth

Answer 3

Radiodense structure with a radiolucent rim and no identifiable toothlets

Question 4

Central odontogenic tumors:

A) Develop outside the bone cortex, within overlying soft tissues
B) Have a solid central area that is well differentiated
C) Have one or more central cystic spaces
D) Develop within bone

Question 5

Keratinizing cystic odontogenic tumors are a feature of which of the following syndromes?

A) Down syndrome
B) Nevoid basal cell carincoma syndrome
C) Behçets syndrome
D) Ectodermal dysplasia

Question 6

All of the following are true about multicystic solid ameloblastomas EXCEPT:

A) They are benign but aggressive, and recurrent in nature.
B) The posterior mandible is the most common location.
C) Recurrence may occur years later.
D) There is an extremely painful swelling of the jaws.

Question 7

All of the following statements about ameloblastic fibromas (AF) are true EXCEPT:

A) The lesions are asymptomatic.
B) They usually occur in patients older than age 20.
C) They are most often encapsulated and easily removed.
D) Ameloblastic fibrosarcoma has been seen in patients whose AFs have recurred multiple times.

Question 8

The degree of radiopacity present in ameloblastic fibro-odontomas depends on:

A) Location of the lesion
B) Age of the patient
C) Amount of enamel and dentin formed
D) Size of the lesion

Question 9

All of the following are characteristics of cementoblastomas EXCEPT:

A) First molars are frequently affected.
B) There may be jaw expansion and pain.
C) The tumor adheres directly to the root of the tooth.
D) Patients are most often over the age of 65.

Question 10

Primary jaw tumors are those that:

A) Originate in the jawbones
B) Are metastatic in origin
C) Originate outside the jawbones
D) Have a known etiology

Question 11

Which of the following helps distinguish CEOTs from ameloblastomas?

A) The age at which they occur
B) Their location within the jaws
C) Presence of scattered radiopacities in CEOTs
D) Vastly different treatment for ameloblastomas

Question 12

Microscopically, odontogenic myxomas resemble tissues of the:

A) Reduced enamel epithelium
B) Outer enamel epithelium
C) Hertwig's epithelial root sheath
D) Dental papilla (pulp)

Question 13

The classic radiographic appearance of a multicystic solid ameloblastoma is described as a:

A) Grape-like radiopacities adjacent to an unerupted tooth or teeth
B) Diffuse radiopaque masses that extend to the alveolar cortex
C) Cotton-wool appearance within the ramus and body of the mandible
D) Soap-bubble appearance

Question 14

Squamous odontogenic tumors (SOTs) arise from which one of the following?

A) Dental papilla
B) Inner enamel epithelium
C) Rests of Malassez within the periodontal ligament
D) Stratum intermedium of the enamel organ

Question 15

Calcifying epithelial odontogenic tumors (CEOTs) are composed of cells that resemble:

A) Reduced enamel epithelium
B) Stratum intermedium of the enamel organ
C) Hertwig's epithelial root sheath
D) Dental papillae

Question 16

Peripheral odontogenic tumors:

A) Develop outside the bone cortex, in overlying soft tissues
B) Are more aggressive than central odontogenic tumors
C) Have a high tendency to metastasize to the lungs.
D) Have a high recurrence rate

Question 17

Neoplasms that arise from remnants of the developing tooth germ are called:

A) Embryonic
B) Metastatic
C) Odontogenic
D) Idiopathic

Question 18

Calcifying cystic odontogenic tumor is characterized by:

A) Calcified epithelial ghost cells
B) Metastasis to distant sites
C) Frequent recurrence
D) Denticles and cementicles

Question 19

Recurrence of keratinizing cystic odontogenic tumors after resection is often related to:

A) Residual daughter cysts that are left behind
B) Location of tumor components within the maxillary sinuses
C) Large amounts of irregular trabecular bone that are left behind
D) Thinner bone of the anterior mandible

Question 20

All of the following are common features of an adenomatoid odontogenic tumor EXCEPT:

A) Location is around the periapical region of an unerupted tooth.
B) There is female predominance.
C) Scattered snowflake-like calcifications may be seen.
D) The radiolucency extends below the cemento-enamel junction.

Question 21

Osteoblastomas are characterized by:

A) Bone tissue that is immature and weak
B) A high tendency to metastasize
C) High recurrence rates
D) Painless infiltration of peripheral nerves

Question 22

All of the following are characteristics of ossifying fibromas EXCEPT:

A) It is a malignant neoplasm comprised of bone and cementum-like material.
B) Teeth may be displaced but are rarely resorbed.
C) Occurs mainly in young adults.
D) The tumor is aggressive and causes painless expansion of the jaw.

Question 23

Alternating bands of calcification within the abnormal bone in osteosarcomas produce what radiographic appearance?

A) Honeycomb
B) Sunburst
C) Frosted-glass
D) Cotton-wool

Question 24

Which of the following tumors most closely resembles a torus?

A) Cementoblastoma
B) Osteosarcoma
C) Osteoma
D) Chondromas