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8. MSK > 5. Lucent Lesions: Looks, locations, age, size > Flashcards

5. Lucent Lesions: Looks, locations, age, size Flashcards

1
Q

Long Lesion in a Long Bone

A

Fibrous Dysplasia

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2
Q

Ground Glass

A

Fibrous Dysplasia

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3
Q

Lytic lesion with a hazy matrix

A

Fibrous Dysplasia

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4
Q

Chondroid Matrix in the Proximal Humerus or Distal Femur

A

Enchondroma

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5
Q

Lucent Lesion in the Finger or Toe

A

Enchondroma

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6
Q

Epiphyseal Tibial Lesion in a Teenager

A

Chondroblastoma

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7
Q

Epiphyseal Equivalent Lesion

A

Chondroblastoma or Giant Cell Tumor
**technically GCTs grow into the Epiphysis

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8
Q

Lucent Lesion in the Greater Trochanter

A

Chondroblastoma

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9
Q

Lucent Lesion with a Fracture (Fallen Fragment) in the Humerus

A

Solitary Bone Cyst

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10
Q

Calcaneal Lesion with Central Calcification

A

Lipoma

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11
Q

Lucent Lesion in the Skull

A

Eosinophilic Granuloma

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12
Q

Vertebra Plana in a Kid

A

Eosinophilic Granuloma

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13
Q

Vertebra Plana in an Adult

A

Mets

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14
Q

Sequestrum / Nidus in the Tibia / Femur

A

Osteoid Osteoma

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15
Q

“Painful Scoliosis”

A

Osteoid Osteoma

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16
Q

Calcified Lesion in the Posterior Element of the C-Spine

A

Osteoblastoma

17
Q

Multiple Sclerotic Lesions

A

Mets

18
Q

Multiple Sclerotic Lesions Centered Around a Joint

A

Osteopoikolosis

19
Q

Multiple Lucent Lesions (older than 40)

A

Mets, Myeloma, Metastatic Non-Hodgkin Lymphoma

20
Q

Nidus < 2.0 cm

A

Osteoid Osteoma

21
Q

Nidus > 2.0 cm

A

Osteoblastoma

22
Q

Well-defined lytic lesion in the cortex of a long bone with a sclerotic rim < 3 cm

A

Fibrous cortical defect

23
Q

Well-defined lytic lesion in the cortex of a long bone with a sclerotic rim > 3 cm

A

Nonossifying fibroma

24
Q

Chondral lesion in a long bone 1-2 cm

A

Probably an Enchondroma

25
Q

Chondral lesion in a long bone > 4-5 cm

A

Increased risk o f low-grade chondrosarcoma

8. MSK (27 decks)

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