Majority are due to esophageal instrumentation
Confirmed by contrast esophagram or CT, which are complementary
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Cervical esophageal perforation (EP)
Subcutaneous or interstitial emphysema; neck and mediastinum
Consider perforation of Zenker diverticulum
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Thoracic EP
Chest film: Pneumomediastinum, pleural effusion
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EP of intraabdominal segment of distal esophagus
Abdominal plain film: Pneumoperitoneum
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EP near GE junction
Extravasated contrast from left lateral aspect of distal esophagus into mediastinum, sometimes pleural space, and rarely abdomen (never abdomen alone)
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CT shows extraesophageal air in almost all cases, fluid and contrast medium in most
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Intramural EP: Extravasated gas and contrast remain within esophageal wall
Much better prognosis
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Esophagography: Technique
Esophagram: Videofluoroscopic and rapid sequence filming
Nonionic water-soluble contrast media (e.g., Omnipaque) initially, followed with barium if no leak or fistula seen
Barium (or CT) may detect small leak not visible initially
TOP DIFFERENTIAL DIAGNOSES
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Esophageal diverticulum
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Postoperative state, esophagus
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Tracheobronchial aspiration
TERMINOLOGY
Abbreviations
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Esophageal perforation (EP)
Synonyms
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Esophageal rupture or transection
Definitions
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Transmural esophageal tear
IMAGING
General Features
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Best diagnostic clue
Diagnosis depends on high degree of suspicion and recognition of clinical features
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Confirmed by contrast esophagram or CT
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Location
Cervical EP: Posterior wall of esophagus at level of cricopharyngeus muscle
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Or through Zenker diverticulum
Thoracic EP: At or near gastroesophageal (GE) junction
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Areas of anatomic narrowing, sites of extrinsic compression by aortic arch or L main bronchus
At or above benign or malignant strictures
Site of ruptured anastomosis or after esophageal surgery
Radiographic Findings
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Radiography
Cervical EP: Anteroposterior, lateral films of neck
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Subcutaneous or interstitial emphysema
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Lateral film: Widening of prevertebral space
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Retropharyngeal abscess; mottled gas, air-fluid level
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Air may dissect along fascial planes from neck into chest, pneumomediastinum, or vice versa
Thoracic EP: Chest radiograph
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Pneumomediastinum
Radiolucent gas streaks along lateral border of aortic arch, descending aorta
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V-shaped radiolucency seen through heart
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Sympathetic left pleural effusion; atelectasis in basilar segment
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Pleural effusion, hydropneumothorax, localized pneumonitis due to esophageal-pleural fistula
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Hydropneumothorax: On left (75%), on right (5%), bilateral (20%)
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Hydrothorax: Usually unilateral, right sided with upper-/mid-EP; left sided with distal EP
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EP of intraabdominal segment of distal esophagus
Abdominal plain film: Pneumoperitoneum
Fluoroscopic Findings
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Esophagography: Determine site and extent of EP
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Intramural EP: Extravasated gas and contrast remain within esophageal wall
Much better prognosis