SARCOMAS:Primary Bone & Soft Tissue Mosby Board review questions
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Soft tissue sarcomas usually spread:
Locally, along the longitudinal muscle plane
When extremities are treated with radiation, it is important to spare:
A strip of soft tissue to prevent obstruction of LYMPH FLOW
When treating a lower extremity, it is almost always necessary to position the patient:
Reversed on the PSA with feet towards the gantry
Sarcomas originate in the ____layer.
A rhabdomyosarcoma is a malignant tumor arising from:
Liposarcomas originate in:
Primary osseous tumors metastasize to the lung via:
Limb salvaging surgery would include:
- All(any?) of the below:
- 1)wide margin excision with bone grafting
- 2)marginal margin excision with internal fixation
- 3)intralesional excision
What feature would be present on an x-raay image of a lytic primary bone tumor?
- Decreased density in the region of the tumor
- (MOTH-EATEN APPEARANCE)
What is the likely explanation for weight loss and fever in the pt suspected to have primary bone cancer?
- Presence of the tumor causes hypercalcemia
- (rare except in Ewing's and Multiple Myeloma)
Radiation to the abdomen for oft tissue sarcomas in the peritoneum is limited by low tolerance organs such as the kidneys. TD 5/5 for whole kidney is:
A natural barrier for the spread of primary bone tumors is:
Compact bone is arranged in concentric circle patterns known as:
The area of spongy bone is found in the:
A solitary multiple myeloma tumor is known as a:
Which bone tumor has an onion skin appearance on x-ray?
A common symptom for soft tissue tumors is:
The most common childhood bone cancer is:
The most common bone cancer overall is:
Kaposi sarcoma is the most common neoplasm in those diagnosed with:
The primary treatment of choice for soft tissue sarcomas located in extremities is:
The variables that are used for staging sarcomas are:
- 1)histological grade
- 2)tumor size
- 3)regional lymph node involvement
- 4)Presence of distant metastases
True of False?
Soft tissue sarcomas are relatively rare.
True of False?
Rhabdomyosarcoma is the most common primary orbital malignancy of childhood
True of False?
Regional lymph nodes must be included in treatment ports for primary bone tumors
False(because they spread by blood)
What are some possible positioning strategies for soft tissue sarcoma of calf?
- 2)supine: opposite leg elevated
- 3)Lateral with feet first
What are some possible positioning strategies for soft tissue sarcoma on right flank?
- 1)supine-arms raised
- 2)lateral decubitus
How does Ewing sarcoma differ from osteosarcoma?
- Ewing-mostly adolescents, originates in bone marrow, round blue cells, midshaft
- Osteosarcoma-end of bones
How do the total radiation doses differ for bone mets vs, primary bone?
- Less dose for mets: (30 Gy/10 fx)
- Primary bone: 50-80 Gy (1.2-2 Gy fx)
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