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  • 1. IMAGING OF THE WEEK DR. PRIYA KUBENDIRAN M1 UNIT PROF. DR. RAMASAMY
  • 2.  
  • 3.  
  • 4.
    • CXR PA view
    • Adequate exposure
    • Soft tissue & bony shadow normal
    • Trachea in midline
    • Heart shadow normal
    • Lung parenchyma - a wedge shaped opacity seen in superior part of Rt lower zone with a thick walled irregular cavity
    • Lateral view – wedge shaped opacity corresponding to right middle lobe with a cavity with ectatic changes with associated collapse
  • 5.
    • IMPRESSION
    • A thick walled cavity right middle lobe with ectatic changes with associated collapse
    • ? PT sequelae
    • ? malignancy
  • 6.  
  • 7.  
  • 8. CAVITY
    • A gas containing space within the lung surrounded by a complete wall ≥ 1 mm in thickness
    • Occurs when an area of necrosis communicates with a patent airway
    • Features : 1) location
    • 2) wall thickness
    • 3) outline
    • 4) fluid level
    • 5) contents
    • 6)surrounding lung
    • 7) multiplicity
  • 9. ETIOLOGY
    • Infectious : bacterial
    • fungal
    • parasites
    • Immunologic : Wegener’s granulomatosis
    • sarcoidosis
    • Neoplastic : primary neoplasms
    • haematogenous metastases
    • Thromboembolic : septic thromboembolism
    • Airways disease : bullae
    • cystic bronchiectasis
    • Traumatic : traumatic lung cyst
    • Developmental : sequestrated segment
    • bronchogenic cyst
  • 10.
    • Acute abscesses
    • Neoplasms
    • Metastases
    • Wegener’s granulomatosis
    • Rheumatoid nodules
    • Bullae
    • Pneumatocoeles
    • Cystic bronchiectasis
    • Chronic inactive TB
    • Hydatid cysts
    • Traumatic lung cysts
  • 11.
    • Acute lung abscess
    • Primary malignancy
    • Post traumatic lung cyst
    • Metastases
    • Wegener’s granulomatosis
    • Septic emboli
  • 12.
    • Klebsiella
    • S.pneumoniae
    • TB
    • Fungal
    • Carcinoma
    • Bullae
    • Sarcoidosis
    • Ps.aeruginosa
    • TB
    • Hydatid cyst
    • Septic thromboembolism
    • Bronchiectasis
    • Staph.aureus
    • Wegener’s
    • Metastases
  • 13. PSEUDOCAVITATION / BUBBLE LUCENCIES
    • In HRCT, round/oval areas of low attenuation ≤ 5 mm in diameter are visible within lung nodules
    • Seen in bronchoalveolar ca (60 %)
    • acinar cell carcinoma (30 %)
    • Represent 1) patent bronchi
    • 2) air containing cystic spaces
    • If ≥ 5 mm : 1) paracicatricial emphysema
    • 2) localised bronchiectasis
    • 3) tumor developing in an area of fibrosis &
    • honeycombing
  • 14. Bubble lucency Pseudocavity
  • 15. Water lily sign Hydatid cyst
  • 16. Fungal ball
  • 17. Wegener’s granulomatosis
  • 18. SCC
  • 19.  
  • 20.  
  • 21.