<prompt> Potts spine is commonest at which spine:ThoracolumbarSacralCervicalLumbosacral  <response>: ANSWER: A ThoracolumbarREF: Apley 387-389, S M Tuli 3rd edition page 192Most common site of skeletal tuberculosis is spine followed by hip and knee SPINE 50 HIP KNEECommonest spine involved in spine TB is ThoracolumbarDorsolumbar T12-L1 Lower thoracic to be preciseLOWER THORACIC LUMBAR UPPER THORACICParaplegia due to pott s spine most commonly involves upper thoracic vertebrae as in upper thoracic vertebrae there is more acute kyphosis, spinal canal is narrow and spinal cord is relatively large.First symptom of TB spine is Pain on movementCommonest symptom of TB spine is Back pain 