Ganga Ram, a 19-year-old male with a short history of pain in the right groin that worsens at night time and has a small circumscribed sclerotic swelling over diaphysis of femur. Likely diagnosis is:
AOsteosarcoma
BEwing's sarcoma
COsteoclastoma
DOsteoid osteoma
Which of the following is not true about osteosarcoma?
ASeen in the metaphyseal region of the long bones
BLung metastasis is common
CSecondary osteosarcoma is seen in older age groups
DMost commonly arises in the epiphyseal region
A 13-year-old boy, previously healthy, presents with a 1-month history of right leg pain, without trauma or recent illness. Physical examination reveals warmth, tenderness, and increased circumference of the right thigh compared to the left. His temperature is 39°C. A radiograph shows a 6-cm expansile mass in the diaphyseal region of the right lower femur, extending into soft tissue and covered by reactive bone. Microscopic examination of the mass biopsy reveals sheets of primitive cells with small, uniform nuclei and scant cytoplasm. Karyotypic analysis shows a t(11;22) translocation. What is the most likely diagnosis?
AEwing sarcoma
BChondrosarcoma
CGiant cell tumor
DMetastatic carcinoma
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