X Ray shows lytic lesion in calceneus in young adult. Biopsy shows following diagnosis: (A) Pigmented viilonodular synovitis, (B) Ochronosis, (C) Osteomylitis, (D) Eumycosis
Answer is A. Ans. (a) Pigmented viilonodular synovitisImage shows hyperplasia of synomin along with hemosiderin laden macrophages and giant cells s/o Pigmented viilonodular synovitis.