Boerhaave syndrome

Esophageal rupture
Classification and external resources
ICD-10	K22.3
ICD-9	530.4
DiseasesDB	9168
MedlinePlus	000231
eMedicine	med/233
MeSH	D004939

Esophageal rupture (also known as Boerhaave's syndrome) is rupture of the esophageal wall due to vomiting. 56% of esophageal perforations are iatrogenic, usually due to medical instrumentation such as an endoscopy or paraesophageal surgery.^[1] In contrast, the term Boerhaave's syndrome is reserved for the 10% of esophageal perforations which occur due to vomiting.^{[citation needed]}

Spontaneous perforation of the esophagus most commonly results from a sudden increase in intraesophageal pressure combined with negative intrathoracic pressure caused by straining or vomiting (effort rupture of the esophagus or Boerhaave's syndrome). Other causes of spontaneous perforation include caustic ingestion, pill esophagitis, Barrett's ulcer, infectious ulcers in patients with AIDS, and following dilation of esophageal strictures.

In most cases of Boerhaave's syndrome, the tear occurs at the left postero-lateral aspect of the distal esophagus and extends for several centimeters. The condition is associated with high morbidity and mortality and is fatal in the absence of therapy. The occasionally nonspecific nature of the symptoms may contribute to a delay in diagnosis and a poor outcome. Spontaneous effort rupture of the cervical esophagus, leading to localized cervical perforation, may be more common than previously recognized and has a generally benign course. Preexisting esophageal disease is not a prerequisite for esophageal perforation but it contributes to increased mortality

This condition was first documented by the 18th-century physician Herman Boerhaave, after whom it is named.^[2][3] A related condition is Mallory-Weiss syndrome.

Signs and symptoms

The classic history of esophageal rupture is one of severe retching and vomiting followed by excruciating retrosternal chest and upper abdominal pain. Odynophagia, tachypnea, dyspnea, cyanosis, fever, and shock develop rapidly thereafter.

The following features were described in an illustrative review:^{[citation needed]}

• A history of alcoholism or heavy drinking was present in 40 percent; presentation during an episode of alcoholism may contribute to a delay in diagnosis.
• A history of gastroduodenal ulcer disease was present in 41 percent.
• Pain occurred in 83 percent, vomiting in 79 percent, dyspnea in 39 percent, and shock in 32 percent.

Physical examination is usually not helpful, particularly early in the course. Subcutaneous emphysema (crepitation) is an important diagnostic finding but is not very sensitive, being present in only 9 of 34 patients (27 percent) in one series . A pleural effusion may be detected. A case report described presentation with an Enterococcal bacterial pericardial effusion.

Mackler's triad which includes chest pain, vomiting and subcutaneous emphysema, while classical, is only present in 14% of people.^[4]

Pain can occasionally radiate to the left shoulder, causing physicians to confuse an esophageal perforation with a myocardial infarction.

It may also be audibly recognized as Hamman's sign.

Differential diagnosis

Common misdiagnoses include myocardial infarction, pancreatitis, lung abscess, pericarditis, and spontaneous pneumothorax. If esophageal perforation is suspected, even in the absence of physical findings, contrast radiographic studies of the esophagus and a CT scan should be obtained promptly.

Pathophysiology

Esophageal rupture in Boerhaave syndrome is thought to be the result of a sudden rise in internal esophageal pressure produced during vomiting, as a result of neuromuscular incoordination causing failure of the cricopharyngeus muscle (a sphincter within the esophagus) to relax. The syndrome is commonly associated with the consumption of excessive food and/or alcohol as well as eating disorders such as bulimia.

The most common anatomical location of the tear in Boerhaave syndrome is at left posterolateral wall of the lower third of the esophagus, 2–3 cm before the stomach.^[5]

Unfortunately, in the present time, the most common cause of esophageal perforation is iatrogenic. However, it should also be noted that iatrogenic perforations, while still constituting a serious medical condition, are easier to treat and less prone to complications, particularly mediastinitis and sepsis. This owes to the fact that they usually do not involve contamination of the mediastinum with gastric contents.

Diagnosis

The diagnosis of Boerhaave's syndrome is suggested on the plain chest radiography and confirmed by chest CT scan. The initial plain chest radiograph is almost always abnormal in patients with Boerhaave's syndrome and usually reveals mediastinal or free peritoneal air as the initial radiologic manifestation. With cervical esophageal perforations, plain films of the neck show air in the soft tissues of the prevertebral space.

Hours to days later, pleural effusion(s) with or without pneumothorax, widened mediastinum, and subcutaneous emphysema are typically seen. CT scan may show esophageal wall edema and thickening, extraesophageal air, periesophageal fluid with or without gas bubbles, mediastinal widening, and air and fluid in the pleural spaces, retroperitoneum or lesser sac.

The diagnosis of esophageal perforation could also be confirmed by water-soluble contrast esophagram (Gastrograffin), which reveals the location and extent of extravasation of contrast material. Although barium is superior in demonstrating small perforations, the spillage of barium sulfate into the mediastinal and pleural cavities can cause an inflammatory response and subsequent fibrosis and is therefore not used as the primary diagnostic study. If, however, the water-soluble study is negative, a barium study should be performed for better definition.

Endoscopy has no role in the diagnosis of spontaneous esophageal perforation. Both the endoscope and insufflation of air can extend the perforation and introduce air into the mediastinum.

Patients may also have a pleural effusion high in amylase (from saliva), low pH, and may contain particles of food.

Treatment

With the exception of few case reports describing survival without surgery,^[6] the mortality of untreated Boerhaave syndrome is nearly 100%.^[7] Its treatment includes immediate antibiotic therapy to prevent mediastinitis and sepsis, surgical repair of the perforation,^[8] and if there is significant fluid loss it should be replaced with IV fluid therapy since oral rehydration is not possible. Even with early surgical intervention (within 24 hours) the risk of death is 25%.^[9]

References

1. ^ Rosen's Emergency Medicine Vol 1|date=October 2010
2. ^ synd/2800 at Who Named It?
3. ^ H. Boerhaave. Atrocis, nec descripti prius, morbis historia: Secundum medicae artis leges conscripta. Lugduni Batavorum; Ex officine Boutesteniana. 1724.
4. ^ Woo KM, Schneider JI (November 2009). "High-risk chief complaints I: chest pain--the big three". Emerg. Med. Clin. North Am. 27 (4): 685–712, x. doi:10.1016/j.emc.2009.07.007. PMID 19932401. 
5. ^ Korn O, Oñate JC, López R (2007). "Anatomy of the Boerhaave syndrome". Surgery 141 (2): 222–8. doi:10.1016/j.surg.2006.06.034. PMID 17263979. 
6. ^ Boerhaave syndrome at eMedicine
7. ^ Curci JJ, Horman MJ (April 1976). "Boerhaave's syndrome: The importance of early diagnosis and treatment". Annals of Surgery 183 (4): 401–8. doi:10.1097/00000658-197604000-00013. PMC 1344212. PMID 1267496. http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=1344212. 
8. ^ Matsuda A, Miyashita M, Sasajima K, et al. (2006). "Boerhaave syndrome treated conservatively following early endoscopic diagnosis: a case report". Journal of Nippon Medical School = Nihon Ika Daigaku zasshi 73 (6): 341–5. doi:10.1272/jnms.73.341. PMID 17220586. http://www.jstage.jst.go.jp/article/jnms/73/6/73_341/_article. 
9. ^ Jougon J. et al. (2004). "Primary esophageal repair for Boerhaave's syndrome whatever the free interval between perforation and treatment". European Journal of Cardiothoracic Surgery (25): 475–479. 

References

• Cecil Textbook of Medicine
• The Oxford Textbook of Medicine

External links

• Radiology Esophageal rupture