Benign Tumors of Bone

Question 1

What is a benign slow growing tumor composed of cortical-type dense bone?

Answer 1

Osteoma

Question 2

What is the name of the lesion that occurs in the metaphysis of a long bone and is the most common benign bone tumor in children?

Answer 2

Nonossifying fibroma

Question 3

What causes a solitary bone cyst to expand?

Answer 3

Fluid fills the cavity and the increased pressure causes bone resorption.

Question 4

What translocation is aneurysmal bone cysts associated with?

Answer 4

Chromosomal translocation t(16;17)

Question 5

What is the typical cut surface of aneurysmal bone cysts composed of?

Answer 5

Spongy mass containing multiple blood-filled cysts

Question 6

Name of benign painful lesion surrounded by a halo of reactive bone formation?

Answer 6

Osteoid Osteoma

Question 7

What exacerbates pain and relieves pain of an osteoid osteoma? When is pain of this particular lesion present?

Answer 7

Alcohol makes it worse, relieved by aspirin, and typically nocturnal

Question 8

A patient is thought to have an osteoid osteoma. The lesion does not cause nocturnal pain relieved by aspirin. Likely Dx?

Answer 8

Osteoblastoma

Question 9

What is the name of the benign intraosseus tumor of mature hyaline cartilage?

Answer 9

Solitary chondroma

Question 10

What is another name for a solitary chondroma?

Answer 10

Enchondroma

Question 11

What is the name of the benign tumor that most often involves the epiphyses of the long bones?

Answer 11

Chondroblastoma

Question 12

Describe the finding of chondromblastoma on radiologic examination.

Answer 12

Radiolucent appearance with sharply demarcated borders typically found at the epiphyses of bones