Osteoblastoma vs Osteosarcoma Quiz

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Questions and Answers

Chondroma is most commonly found in which part of the body?

  • Knee
  • Vertebral column
  • Pelvic bones (correct)
  • Skull

What distinguishes osteosarcoma from osteoblastoma on X-ray imaging?

  • Destructive mixed blastic and lytic mass (correct)
  • Polypoid growth with a mushroom-like appearance
  • Central area (nidus) radiolucent with sclerotic rim
  • Variably calcified and multilobular appearance

What histologic feature is characteristic of osteochondroma?

  • Interlacing trabeculae of woven bone surrounded by osteoblasts
  • Variable calcification and multilobular appearance
  • Loose connective tissue stroma with giant cells
  • Tons of osteoid (correct)

Which tumor shows a notable 'mushroom-like' appearance on X-ray imaging?

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

Aggressiveness of chondrosarcoma is determined by all of the following EXCEPT:

<p>Presence of calcifications (A)</p> Signup and view all the answers

In Ewing sarcoma, which part of the bone is typically affected?

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

Which tumor has an ovoid shape with a long axis parallel to bone, a sclerotic margin, and a lobulated contour?

<p>Chondromyxoid fibroma (D)</p> Signup and view all the answers

Which benign tumor can lead to generalized loss of bone density with endosteal resorption and expand into bone lesions?

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

Which benign bone lesion originates from the calcaneus and does not require a biopsy?

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

Which benign tumor may convert to chondrosarcoma in older patients and appears as a bubbly radiolucent lesion with calcifications?

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

Which benign tumor presents as a bony projection from the bone surface resembling a mushroom cap?

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

Which benign tumor shows an increased T2 signal and decreased T1 signal on imaging studies?

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

What is the notable thing about Fibrous Dysplasia?

<p>NIDUS with zone of sclerosis (B)</p> Signup and view all the answers

Which tumor can metastasize to the lungs or transform to fibrosarcoma or osteogenic sarcoma?

<p>Giant Cell Tumor (D)</p> Signup and view all the answers

What is the characteristic feature of an Aneurysmal Bone Cyst?

<p>Swelling and pain subperiosteal (A)</p> Signup and view all the answers

Which tumor has a CHICKEN WIRE appearance?

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

In which tumor do you find a Replacement of bone interior with fibro-osseous tissue?

<p>Fibrous Dysplasia (A)</p> Signup and view all the answers

Which tumor shows an aggressive expansion and can lead to pain?

<p>Giant Cell Tumor (C)</p> Signup and view all the answers

What is the characteristic appearance of Pigmented Villonodular Synovitis (PVNS) on MRI imaging?

<p>Low signal intensity on both T1 and T2 (C)</p> Signup and view all the answers

Which tumor/growth is characterized by having an appearance that resembles a coral reef on MRI imaging?

<p>Pigmented Villonodular Synovitis (PVNS) (D)</p> Signup and view all the answers

What is the age range commonly associated with Giant Cell Tumor of Tendon Sheath?

<p>40-50 (D)</p> Signup and view all the answers

Which tumor/growth can cause joint pain, swelling, catching, locking, stiffness, or instability as symptoms?

<p>Pigmented Villonodular Synovitis (PVNS) (A)</p> Signup and view all the answers

What distinguishes Neurilemmoma (Schwannoma) from other benign tumors based on its location?

<p>Perineum (peripheral nerve sheath) (B)</p> Signup and view all the answers

Which tumor/growth can erode bone and joint structures, leading to pain and swelling?

<p>Pigmented Villonodular Synovitis (PVNS) (C)</p> Signup and view all the answers

What distinguishes a mucoid cyst from other benign tumors?

<p>High recurrence rate after aspiration (B)</p> Signup and view all the answers

Which imaging feature is characteristic of a lipoma?

<p>High T2 signal intensity on MRI (C)</p> Signup and view all the answers

What differentiates fibroma from other benign tumors?

<p>Transillumination with skin (C)</p> Signup and view all the answers

In which age group is pigmented villonodular synovitis (PVNS) most commonly seen?

<p>20-30 years old (B)</p> Signup and view all the answers

What is the primary symptom associated with a mucoid cyst?

<p>Pressure causing pain due to cyst growth (B)</p> Signup and view all the answers

Which option correctly characterizes lipomas compared to other benign tumors?

<p>Observation as the primary treatment option (A)</p> Signup and view all the answers

What type of tumor/growth is characterized by an aggressive expansion and can lead to pain?

<p>Pigmented villonodular synovitis (PVNS) (C)</p> Signup and view all the answers

Which benign tumor may convert to chondrosarcoma in older patients and appears as a bubbly radiolucent lesion with calcifications?

<p>Mucoid cyst (D)</p> Signup and view all the answers

In which type of tumor/growth would you expect to see a notable 'mushroom-like' appearance on X-ray imaging?

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

Which tumor/growth is characterized by an ovoid shape with a long axis parallel to bone, a sclerotic margin, and a lobulated contour?

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

What is the notable imaging feature of an aneurysmal bone cyst?

<p>Bubble radiolucency with calcifications (C)</p> Signup and view all the answers

Which tumor/growth is characterized by a piece of bone breaking off and depositing on the gravity-dependent edge of the lesion?

<p>Solitary bone cyst (D)</p> Signup and view all the answers

Which tumor is characterized by a 'mottled moth-eaten destructive lesion' appearance on imaging?

<p>Ewing sarcoma (D)</p> Signup and view all the answers

Which tumor is notable for its soft tissue mass, onion skin periosteal reaction, and presence in the diaphysis with periosteal reaction?

<p>Osteogenic sarcoma (A)</p> Signup and view all the answers

Which tumor/growth mimics osteomyelitis with symptoms of fever, pain, swelling, and increased ESR?

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

Which benign growth is characterized by a focal periosteal reaction, bubble radiolucency, calcifications, and extent into soft tissue?

<p>Aneurysmal bone cyst (C)</p> Signup and view all the answers

Which benign tumor can present with a BLOWOUT appearance, typically affecting individuals between the ages of 5-20, and is commonly found in the metaphysis?

<p>Aneurysmal bone cyst (C)</p> Signup and view all the answers

Which tumor/growth is characterized by an aggressive expansion, potentially leading to pain, and can rarely metastasize, transforming into fibrosarcoma or osteogenic sarcoma?

<p>Giant cell tumor (D)</p> Signup and view all the answers

In which age group is Ewing sarcoma most commonly observed, appearing as a large eccentric, oval, radiolucent, destructive lesion in the epiphysis?

<p>&gt;30s (C)</p> Signup and view all the answers

What is a notable feature of Fibroma that distinguishes it from other tumors?

<p>Vascular connective tissue stroma (B)</p> Signup and view all the answers

Which tumor/growth is known for producing high amounts of prostaglandins, leading to night pain treated by aspirin, and consists of osteoid tissue intermixed with woven bone surrounded by sclerosis?

<p>Osteoid osteoma (A)</p> Signup and view all the answers

What imaging feature is characteristic of a Fibroma?

<p>Mosaic glass appearance on MRI (D)</p> Signup and view all the answers

What distinguishes an Aneurysmal Bone Cyst from other benign tumors on imaging studies?

<p>Sharp borders and high signal intensity on T2-weighted MRI (C)</p> Signup and view all the answers

In Ewing sarcoma, which part of the bone is typically affected?

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

Which of the following is a notable characteristic of Osteoblastoma compared to other blastomas?

<p>Common occurrence in children under 10 years old (A)</p> Signup and view all the answers

What differentiates a Ganglion Cyst from a Fibroma based on imaging characteristics?

<p>'Lights up' on imaging studies (A)</p> Signup and view all the answers

Which MRI feature is typically seen in Fibromas compared to other benign tumors?

<p>Low signal intensity on T1-weighted imaging (D)</p> Signup and view all the answers

What is a distinguishing feature of a Mucoid Cyst compared to other benign lesions?

<p>'DIPJ arthrodesis' as a resolution method for recurrence (A)</p> Signup and view all the answers

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