Cartilage Tumors

Question 1

Primary Benign Cartilage tumors (4)

Answer 1

Enchondroma
Osteochondroma
Chondromyxoid Fibroma
Chondroblastoma

Question 2

Aggressive Cartilage Tumors (2)

Answer 2

Primary Chondrosarcoma

Secondary Chondrosarcoma

Question 3

Enchondromas are most common in the ________ and __________.

Answer 3

Hands and feet (50% found in hands)

Question 4

Enchondromas typically form in what age group?

Answer 4

10-30 years old but often found thereafter

Question 5

T/F Enchondromas are usually symptomatic.

Answer 5

False, usually asymptomatic unless pathologic fracture occurs

Question 6

The closer the the axial skeleton, the _>;

Answer 6

> the greater the risk

Question 7

MC benign Tumor?

Answer 7

Osteochondroma (50% of all bone tumors)

Question 8

3 bones Osteochondromas love

Answer 8

FEMUR, humerus, and tibia

Question 9

What percent of Osteochondromas are found before age 20?

Answer 9

75%

Question 10

T/F when identifying an osteochondroma, Cortical breaks and periosteal reactions would be present.

Answer 10

False

Question 11

Define exostosis

Answer 11

Exostosis, also called osteoma, is a benign growth of new bone on top of existing bone. It can occur in many parts of the body. When the exostosis is covered with cartilage, it’s called an osteochondroma.

Question 12

Osteochondromas may present with Pedunculated or Sessile exostoses: what is the difference?

Answer 12

Pedunculated/Coat Hanger’s exostosis: stalk with lesion pointing away from closest joint

Sessile: flat broad based exostosis

Question 13

What would you call multiple Osteochondromas, often bilateral and somewhat symmetric.
30% will have BAYONET hand deformity (short ulna, bowed radius, dislocated radio-ulnar joint)
5-25% malignant degeneration rate

Answer 13

Hereditary Multiple Exostosis (HME)

Question 14

A patient, age 22, presents with pain at the knee. Radiograph shows well defined eccentric ovoid radiolucent lesion 3cm in length, NO cortical break or Periosteal Rxn, and a scalloped endosteal margin. The DDx would include:

Answer 14

Chondromyxoid Fibroma

Simple Bone Cyst

Question 15

Which tumor likes the Epiphysis or tubercles
well defined round or oval radiolucent lesion, 
usual thin sclerotic rim
May have central calcification
No cortical break
MC age 10-25
Less than 1% of all primary bone tumors
Long bones esp. humerus
Often called “Codman’s Tumor”

Answer 15

Chondroblastoma

Question 16

The two most common neoplasms to effect the epiphysis

Answer 16

Chondroblastoma

Giant cell tumor

(YR 1282)

Question 17

3rd most common primary malignant tumor of bone

Answer 17

Primary Chondrosarcoma

Question 18

Age onset of Primary Chondrosarcoma?

Answer 18

40-60

Question 19

Primary Chondrosarcoma usually occurs in which two bones?

Answer 19

pelvis and femur

Question 20

Are primary Chondrosarcomas usually painful?

Answer 20

Yes

Question 21

Central Chondrosarcomas occur how much more frequently than peripheral?

Answer 21

5x more

Question 22

T/F Primary Chondrosarcomas will often break the cortex and have large soft tissue mass both of which can have stipples calcification

Answer 22

True