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