Diagnosis of Boerhaave Syndrome
Contrast-enhanced CT with CT esophagography is the imaging examination of choice for diagnosing Boerhaave syndrome, with 92-100% sensitivity in detecting esophageal perforation. 1
Clinical Presentation and Initial Suspicion
Boerhaave syndrome results from spontaneous transmural esophageal rupture, typically following forceful vomiting that causes abrupt increases in esophageal pressure without relaxation of the upper esophageal sphincter. Maintain a high index of suspicion in any patient presenting with chest pain, epigastric pain, or respiratory symptoms following vomiting episodes 1. The classic presentation includes:
- Thoracic pain (70% of cases)
- Fever (50%)
- Dyspnea (25%)
- Subcutaneous emphysema (19%)
- Dysphagia (7%)
Critical pitfall: Over 50% of cases have delayed diagnosis because symptoms are nonspecific and can mimic more common conditions like myocardial infarction, aortic dissection, or peptic ulcer disease 1. The perforation typically occurs on the left border of the lower third of the thoracic esophagus with large defects (3-8 cm) 1.
Diagnostic Algorithm
Step 1: Laboratory Studies
Obtain routine blood work including CBC, electrolytes, renal function, liver enzymes, pH, and serum lactate 1. However, laboratory findings are nonspecific and should not delay imaging—leukocytosis, elevated CRP, and procalcitonin merely reflect inflammatory response and sepsis rather than confirming the diagnosis 1.
Step 2: Imaging - The Cornerstone
Immediately proceed to contrast-enhanced CT with CT esophagography in hemodynamically stable patients with suspected esophageal perforation 1. This modality:
- Detects esophageal perforation with 92-100% sensitivity
- Identifies extension to adjacent structures (mediastinal air/fluid collections, pleural effusions, pneumothorax)
- Excludes mimicking conditions (aortic dissection, esophageal hematoma)
- Guides initial therapeutic decisions 1
CT findings diagnostic of Boerhaave syndrome include:
- Pneumomediastinum
- Pleural effusions (often bilateral, though the perforation site may not correlate with the distribution of contamination) 2
- Paraesophageal collections
- Free air in mediastinum or pleural space
- Hydrothorax or pneumothorax 1
Plain chest radiography may show indirect signs (pleural effusion, pneumomediastinum, subcutaneous emphysema, lung collapse) but is insufficient for definitive diagnosis 1.
Step 3: Endoscopy - Selective Use
Flexible endoscopy should be performed as an adjunct to CT when imaging findings are equivocal or to localize the perforation site precisely 1. Endoscopy provides direct visualization and can alter surgical management in up to 69% of cases 1. However, exercise caution as endoscopy carries risks of enlarging the perforation and worsening contamination 1.
Important caveat: Radiographic findings do not always reveal the exact perforation site—the distribution of pleural contamination may not correlate with the location of the esophageal tear 2. In such cases, esophagogastroscopy combined with video-assisted thoracoscopic surgery (VATS) offers complementary diagnostic and therapeutic benefits 2.
Step 4: Bedside Ultrasound - Emerging Tool
In emergency settings, bedside ultrasound can aid rapid diagnosis by detecting pleural effusions, pneumothorax, or hemopneumothorax 3, 4. While not definitive, ultrasound findings should prompt immediate CT imaging.
Key Diagnostic Considerations
Time is critical: Mortality ranges from 10-20% overall, with delay in treatment being the most important survival predictor 1. Early diagnosis (within 24 hours) is associated with significantly lower mortality compared to late diagnosis 5.
The Pittsburgh perforation score (based on 10 clinical and radiological factors) can help risk-stratify patients, with scores ≤2 potentially eligible for non-operative management 1. However, this should not delay definitive imaging.
Contrast esophagography (gastrografin/barium swallow) may provide additional information about perforation location and containment in select cases, but has largely been replaced by CT esophagography as it can miss up to 30% of small perforations and requires a cooperative patient 1.