MCQ – 87993


A 45-year-old man has experienced pain in the area of the left hip and upper thigh for the past 7 months. On physical examination, there is tenderness on deep palpation of the left side of the groin. There is a reduction in range ofmotion at the left hip. There is no swelling or warmth to the touch. Pelvic and left leg radiographs show an upper femoral masslesion arising in the metaphyseal region and eroding the surrounding bone cortex. The proximal femur is excised and on sectioning has the gross appearance shown in the figure. Which of the following cell types is most likely to be proliferating in this mass?

A. Osteoblasts



C. Osteoclasts


Primitive neuroectodermal cells

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