<prompt> Most common site of TB -SpineKneeHipShoulder  <response>: Ans. is a i.e., Spine Skeletal tuberculosiso Tuberculous infection of bone osteomyelitis is a form of secondary osteomyelitis caused by hematogenous dissemination from a primary infected visceral focus. The primary-focus may be active or quiescent, apparent or latent; either in the lungs, lymph glands or other viscera.Tuberculous infection of bone Tubercular Osteomyelitis vs Bacterial infection Bacterial OsteomyelitisAcute bacterial InfectionTuberculous Infectiono Perisoteal Reaction is markedo Sequestra are commono Perifocal Reactive bone formation involucrum is prominento Involvement of adjacent tissues may result in abscess formationo Abscess wall shows characteristic signs of inflammationo Periosteal Reaction is minimal limitedo Sequestra are very uncommono Very little Perifocal Reactive bone formation is seen lesion is primarily a lytic processo Involvement of adjacent tissues may result in abscess formationo Abscess wall does not show characteristic signs of inflammation cold abscesso The spine is the commonest site of bone and joint tuberculosis, about 50 percent of the total number of cases,o Next in order of frequency are the hip. the knee and the elbow.TissueDiseaseRemarksBoneo Long boneo Short bone phalangeso SpineTB osteomyelitisTubercular dactylitisTB spondylitisTibia commonly affectedAlso called spina ventosaAlso called Potts diseaseJointo Arthritiso SynoviumTB arthritisSynovial TBHip joint commonly affeetedKnee-commonest siteOtherso Tendon synoviumo BursaeTB tensosynovitis of flexor tendons at wristTB bursitis of trochantericCompound palmar ganglionTrochanteric bursitis 