PATHOLOGY

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PATHOLOGY MCQ

TUMOURS GENERAL FEATURES

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
A 12-year-old boy is diagnosed with osteosarcoma of the left distal femur. The lesion measures 7 cm and is associated with a soft-tissue mass that extends into the vastus lateralis. A CT scan of the chest is normal. A bone scan reveals another lesion in the contralateral right proximal femur. Biopsy of the right proximal femur lesion also reveals osteosarcoma. According to AJCC, what is the stage of this tumor?
A
II-A
B
II-B
C
III
D
IVA
E
IVB
Explanation: 

Detailed explanation-1: -The survival for patients with isolated osteosarcoma is approximately 70% and has not substantially improved in over 25 years.

Detailed explanation-2: -Osteosarcoma occurs most often in children and young adults between the ages of 10 and 20 and often during a growth spurt. It occurs more frequently in boys than girls. Osteosarcoma is a bone cancer, which means it can spread to other organs or tissues in the body, most commonly starting with the lungs.

Detailed explanation-3: -Osteosarcoma often starts at the end of the long bones, where new bone tissue forms as a young person grows. Any bone in the body can be affected. The most common sites are in the arms and legs, particularly around the knee and shoulder joints.

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