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
Patient aged 30 yr presented with swelling around knee Aspirate shows giant cells and mononuclear cells Most likely diagnosis is
assistant
The correct answer is  Giant cells present in i Gaint cell tumor= epilphyseal tumour ii Chondroblastoma REF : MAHESWARI 9TH ED