Imaging Studies for Bone Tumors Quiz

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Questions and Answers

What is the primary characteristic of the periosteal response seen with malignant bone tumors?

  • Sclerotic ring expansion and cortical thinning
  • Ill-defined margins and loss of the cortical barrier (correct)
  • Rapid growth and permeative/moth-eaten destruction of the transitional zone
  • Well-defined margins surrounding the lesion

Where is the location of origin for most bone lesions?

  • Diaphyseal
  • Epiphyseal
  • Metaphyseal (correct)
  • The lesion can originate from any part of the bone

How do benign bone tumors typically affect the surrounding bone?

  • Well-defined margins with a sclerotic ring surrounding the lesion (correct)
  • Rapid, permeative destruction of the bone
  • Ill-defined margins with loss of the cortical barrier
  • Expansion of the bone with cortical thinning

What radiographic characteristic can sometimes point to a specific type of bone tumor?

<p>Specific characteristic features (D)</p> Signup and view all the answers

How do malignant bone tumors typically affect the surrounding bone?

<p>Rapid, permeative destruction with loss of the transitional zone (A)</p> Signup and view all the answers

What is the best imaging study to define the extent of many tumors?

<p>MRI (B)</p> Signup and view all the answers

Which imaging study is ideal for evaluating cortical continuity in bone lesions?

<p>CT scan (B)</p> Signup and view all the answers

What is a characteristic feature of bone lesions observed through bone scans?

<p>Hot spots (A)</p> Signup and view all the answers

What is the diagnostic accuracy of closed biopsy techniques for bone tumors?

<p>~70-80% (C)</p> Signup and view all the answers

In Enneking staging system, what does 'T0' indicate about the local extension of a bone tumor?

<p>No local extension (C)</p> Signup and view all the answers

Which type of bone tumor resection is considered the gold standard for malignant bone tumors?

<p>Radical resection (D)</p> Signup and view all the answers

What is the key difference between wide resection and radical resection for bone tumors?

<p>Wide resection leaves behind microscopic tumor, while radical resection removes the entire bone. (A)</p> Signup and view all the answers

What percentage of patients with metastatic bone disease have distant nonpulmonary metastases?

<p>Approximately 10% (A)</p> Signup and view all the answers

Which type of bone lesion is associated with a reactive zone surrounding the tumor?

<p>Chondrosarcoma (C)</p> Signup and view all the answers

What type of radiographic finding is associated with periosteal reaction in bone lesions?

<p>Mixed osteoblastic and osteolytic (A)</p> Signup and view all the answers

Which of the following best describes the location of a bone lesion that involves the cortex and medullary cavity, with a periosteal reaction?

<p>Eccentric lesion (D)</p> Signup and view all the answers

If a bone lesion causes cortical destruction and periosteal elevation, what type of periosteal reaction is likely present?

<p>Sunburst periosteal reaction (A)</p> Signup and view all the answers

In a bone lesion that causes expansile remodeling of the bone, what type of reaction is the bone exhibiting?

<p>Blastic reaction (C)</p> Signup and view all the answers

Which of the following radiographic findings is most suggestive of a malignant bone lesion?

<p>Narrow zone of transition (D)</p> Signup and view all the answers

In a bone lesion with a central location and a narrow zone of transition, what type of reaction is the bone exhibiting?

<p>Permeative reaction (B)</p> Signup and view all the answers

Flashcards

Malignant Bone Tumor Periosteal Response

Ill-defined margins and loss of the cortical barrier.

Origin Location of Most Bone Lesions

Metaphyseal.

Benign Bone Tumor Effect

Well-defined margins with a sclerotic ring surrounding the lesion.

Radiographic Tumor Indicator

Specific characteristic features.

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Malignant Bone Tumor Effect

Rapid, permeative destruction with loss of the transitional zone.

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Best Imaging Study for Tumor Extent

MRI.

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Ideal Imaging for Cortical Continuity

CT scan.

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Bone Scan Feature

Hot spots.

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Closed Biopsy Diagnostic Accuracy

~70-80%.

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Enneking Stage T0

No local extension.

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Gold Standard Resection for Malignant Tumors

Radical resection.

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Wide vs. Radical Resection

Wide resection leaves behind microscopic tumor, while radical resection removes the entire bone.

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Metastatic Bone Disease Distant Nonpulmonary Metastases

Approximately 10%.

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Bone Lesion with Reactive Zone

Chondrosarcoma.

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Periosteal Reaction Radiographic Finding

Mixed osteoblastic and osteolytic.

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Lesion Location Involving Cortex & Medullary Cavity

Eccentric lesion.

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Periosteal Reaction with Destruction & Elevation

Sunburst periosteal reaction.

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Bone Reaction in Expansile Remodeling

Blastic reaction.

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Radiographic Finding Suggestive of Malignancy

Narrow zone of transition.

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Bone Reaction in Central Location/Narrow Zone

Permeative reaction.

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