Malignant Lesions

Question 1

T/F: Malignant lesions are often well defined.

Answer 1

False

Question 2

T/F: Malignancies can cause irregular widening of the PDL.

Answer 2

True

Question 3

T/F: Malignancies typically resorb the teeth around them.

Answer 3

False

Question 4

What should you be thinking if teeth appear to be floating in space?

Answer 4

Malignancy

Question 5

What does it mean for a lesion to be corticated?

Answer 5

It has a very distinct border

Question 6

What is the only malignancy that will displace teeth?

Answer 6

Leukemia

Question 7

What is the difference between the way benign tumors act on roots and malignant tumors?

Answer 7

Benign - either displace or directionally resorb

Malignant - irradically/nondirectionally resorb

Question 8

What is the most common interaction between a malignancy and the periosteal bone?

Answer 8

The malignancy will just go right through and destroy it

Sometimes malignancies will cause periosteal regrowth at right angles to the normal bone (sunburst)

Question 9

T/F: Any lesion with soft tissue growing into or out of the bone means malignancy.

Answer 9

True

Question 10

T/F: Malignant lesions have a wide zone of transition.

Answer 10

True

Question 11

T/F: Malignant tumors have a moth-eaten margin.

Answer 11

True

Question 12

T/F: With most cancers, if the patient is cancer free for five years there is not likely to be metastasis to the jaw.

Answer 12

True

Breast cancer is exception

Question 13

Where are carcinomas typically seen?

Answer 13

Posterior mandible

Question 14

Describe a Carcinoma lesion?

Answer 14

Radiolucent lesion in the posterior mandible with ill-defined border

Question 15

T/F: Carcinomas can cause fractures of the mandible.

Answer 15

True

Question 16

What is the most common malignancy of the bone?

Answer 16

Osteosarcoma

Question 17

T/F: Osteosarcoma will cause widening of the PDL.

Answer 17

True

Question 18

What are two key indicators of osteosarcoma?

Answer 18

1. PDL widening

2. Sunburst periosteum appearence

Question 19

Multiple punched-out round radiolucencies in the skull and jaws is indicative of __________.

Answer 19

Multiple myeloma

Question 20

T/F: Multiple myeloma will usually have ill defined borders.

Answer 20

False

Multiple radiolucencies with well-defined but non corticated borders

Question 21

__________ is often seen in sights of developing teeth.

Answer 21

Leukemia

Question 22

T/F: Leukemia is the only malignancy that can displace teeth occlusally.

Answer 22

True

Question 23

Metastatic lesions from which two regions can look opaque?

Answer 23

Breast and prostate

Question 24

Which malignancies will most often cause nondirectional root resorption?

Answer 24

Sarcomas and multiple myeloma

Question 25

T/F: The majority of malignancies are radiolucent.

Answer 25

True

Question 26

T/F: Malignancies usually have very little discernible trabecular pattern.

Answer 26

True