system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
A 70 year old male has a pathologic fracture of femur. The lesion appears lytic on X-ray with a circumscribed punched out appearance. The curetting from fracture site is most likely to show which of the following?
assistant
The correct answer is  Malignant cells forming osteoid bone