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BONE & JOINT INFECTION (OSTEOMYELITIS (Non-Suppurative TB, LBP…

- - - - Epiphysis, Metaphysis
        
        vessels perforate the open growth plate
        
        break through the cortex to the subperiosteal region, spread underneath the periosteum → loss of blood supply → necrosis
        
        sequestrum = necrotic bone separated from viable bone by granulation tissue
        
        Involucrum = living bone in necrotic bone
        
        localized swelling
        
        fat plane displacement = blurring of fat/muscle interface
        
        may see gas w/certain organisms
        
        moth-eaten pattern of bone destruction
        
        solid or laminated periosteal reaction
    - - Visceral infection, dental procedure, back pain
      - Vascularity of disc allows for primary joint involvement --> loss of disc height
      - Secondary endplate & vertebral body destruction, disc height loss
      - Paraspinal line displacement from oedema/abscess
        
        paraspinal line displacement from edema/abscess
      - epidural abscess and cord compression
      - - unilateral sacroiliitis
  - - - Pott's spine / Gibbus Deformity
      - paraspinal line deviation from spinal abscess
      - anterior vertebral body erosion
      - psoas (cold) abscess
    - - Tubaculous Dactylitis TB of the tubular bones of the hands/feet (spina ventosa)
      - Cystic TB round to oval lucent lesions in the appendicular skeleton
        
        mimic polyostotic tumor-like conditions
      - Pott’s Puffy Tumor TB of the skull with cold abscess of scalp
      - Weaver’s Bottom TB of the subgluteal bursa that extends into the ischial tuberosity
      - Pott’s paraplegia TB changes in spine cause cord compression
      - Long vertebrae elongation of vertebra adjacent to longstanding gibbus deformity from childhood