2007 Radiology Exam - Thorax Case 2

Information provided to the candidate

  • Sg: 2 month old filly
  • Hx: Presented for respiratory distress, lethargy, anorexia
  • Rads: Left lateral view of the thorax

See image below. Click to enlarge.

Candidates received points for:

  • Dilated fluid and air filled thoracic esophagus with fluid-air interface
  • Diffuse mixed interstitial and alveolar pulmonary pattern
  • Poorly defined radiolucencies within the caudo-ventral alveolar pattern

Radiographic Diagnosis:

  • Megaesophagus: differentials of idiopathic, ulcers, aerophagia (less likely due to fluid accumulation); probably incidental to pulmonary pathology
  • Hematogenous pneumonia with possible abscess formation: differentials of bacterial etiologies including Rodococcus. Aspiration pneumonia possible but less likely given distribution

Foal was euthanized. A cause of megaesophagus was not determined. Rodococcus was cultured from lungs