Oncology

Question 1

Child with cystic lesion at epiphysis of long bone. Most likely diagnosis?

Answer 1

Osteoblastoma

Question 2

Clinical presentation of tumours?

Answer 2

Pain - Pathological pain (worse at rest), night pain (wakes pt up at night)
Pathological fracture
Constitutional symptoms
Swelling
Limited ROM
Skin lesions - Cafe au lait spots

Question 3

Common tumour in** epiphysis** of long bone?

Answer 3

Chondroblastoma (immature)
Giant Cell tumour (mature)
Clear cell chondroma

Question 4

Common tumours in **Metaphysis **of long bone?

Answer 4

Osteosarcoma
Chondrosarcoma

Question 5

Common tumours in Diaphysis of long bone

Answer 5

Ewing’s sarcoma
Adamantinoma

Question 6

Common tumours in flat bone?

Answer 6

Chondrosarcoma
Ewing’s sarcoma

Question 7

Common tumours in** parosteal?**

Answer 7

Osteosarcoma
Chondroma

Question 8

Criteria for prophylactic fixation in extraspinal mets?

Answer 8

Harrington’s criteria
>50% loss of diaphyseal cortices
50-75% loss of metaphysis
Permeative destruction of subtrochanteric femoral region
Persistent pain following radiation

Question 10

Why give prophylactic fixation compared to actual fixation?

Answer 10

Shorter operative time
Lower morbidity
Faster recovery

Question 11

Anatomic classification for mets bone lesions?

Answer 11

Intraspinal vs Extraspinal

Question 12

Most common site of bone mets?

Answer 12

Thoracic spine. T10