1 MCQs in Pathology for NEET PG
A 12-year-old boy presents with 5 months of progressive deep-seated pain in the mid-thigh, intermittent low-grade fever, fatigue, and weight loss. Plain radiographs reveal a permeative lytic lesion centered on the mid-diaphysis with cortical destruction and a lamellated "onion-skin" periosteal reaction. MRI confirms extensive marrow replacement with a large circumferential extra-osseous soft-tissue component. Open biopsy is performed. The structure marked **B** in the diagram shows the gross pathologic appearance of the resected specimen. Which of the following best describes the gross pathologic features of this diaphyseal tumor?
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