Oncology Flashcards

1
Q

The most common parotid tumor in pediatric

A

Pleomorphic adenoma then hemangioma

Mucoepidermoid is the most common Malignant tumor in parotid

bengin most common than malignant in general

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Osteosarcoma

A

Osteosarcoma

  • most frequently diagnosed in 2nd decade of life (60%), 2nd most common primary malignancy in adults
  • history of Paget’s disease, previous radiation treatment
  • predilection for sites of rapid growth: distal femur (45%), proximal tibia (20%), and proximal humerus (15%)

invasive, variable histology; frequent metastases without treatment (lung most common)

  • painful symptoms: progressive pain, night pain, poorly defined swelling, decreased ROM
  • radiographic findings:

1- characteristic periosteal reaction: Codman’s triangle or “sunburst” spicule formation (tumour extension into periosteum)

2- destructive lesion in metaphysis may cross epiphyseal plate

management:

complete resection (limb salvage, rarely amputation), neo-adjuvant chemo; bone scan – rule out skeletal metastases, CT chest – rule out pulmonary metastases

prognosis: 70% (high-grade); 90% (low-grade)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly