<prompt> Spina ventosa is:Tubercular dactylitisTB of spineTB of vertebral pediclesExtra-axial  <response>: Ans a Tubercular dactylitisRef: Maheshwari 5th ed.203 Spina ventosa Cwind-filled sail refers to the end- stage radiographic appearance of tuberculosis dactylitis. Cystic expansion of the short tubular bones with bone destruction. Tuberculous dactylitis is the painless tuberculous involvement of the fingers and toes and is more common in children. It begins with fusiform soft-tissue swelling with or without periostitis.Also Know MC site bone TB: Spine Hip Knee MC site in spine is Thoracolumbar paradiscal Earliest symptom: BACK PAIN Triad of TB joint: Decreased joint space articular damage Juxta-articular osteoporosis Spina ventosa- TB of short bones Caries sicca: TB shoulder Poncet disease: TB associated with polyarthritis. 