Bone Tumours Flashcards

1
Q

What are the 4 main benign bone tumours?

A

Osteochondroma
Chondroma (enchondroma)
Osteoid osteoma
Chondroblastoma

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2
Q

Describe osteochondroma

A

Cartilagenous bony projection on external surface of bone, usually near epiphyses, with marrow cavity continuous with original bone
Usually chondrocyte origin

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3
Q

Describe chondroma/enchondroma

A

Hyaline cartilage tumour arising in the medullary cavity

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4
Q

Which two developmental disorders are associated with chondroma?

A

Ollier’s disease and Maffuci syndrome

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5
Q

Which has the greater risk of malignant transformation - Ollier’s disease or Mafucci syndrome?

A

Mafucci

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6
Q

Describe osteoid osteoma

A

Osteoblastic tumour of neoplastic/infectious origin; appears as a lucent nidus with sclerotic bone

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7
Q

List clinical features of osteoid osteoma

A

Swelling/tenderness
Males, children/young adults
Dull pain at night relieved by NSAID

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8
Q

Describe chondroblastoma

A

Rare cartilagenous tumour within bone, usually epiphyses
Usually teenagers
“chicken-wire calcification”

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9
Q

List the 3 main benign + locally aggressive tumours

A

Giant cell tumour
Osteoblastoma
Chordoma

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10
Q

Describe giant cell tumours

A

Osteoclast-derived tumour of long bones, usually knee
Radiolucent with multinucleated cells
“soap-bubble” appearance on XR

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11
Q

List the 3 main malignant bone tumours in order of most common - least common

A

Osteosarcoma
Chondrosarcoma
Ewing’s sarcoma

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12
Q

Secondary bone tumours (metastatic) are more common than primary. True/False?

A

True

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