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Plain X-ray findings of post sleeve gastrectomy gastric leak
How to cite this article: Alharbi SR. Plain X-ray findings of post sleeve gastrectomy gastric leak. J Clin Imaging Sci 2022;12:28.
Gastric leak following sleeve gastrectomy (SG) is a rare but significant cause of morbidity and mortality. A high clinical index of suspicion is the most sensitive approach to detect gastric leaks. Computed tomography (CT) is the gold standard diagnostic technique, although it might not be performed due to unavailability, and the inability to image superobese patients due to limited CT gantry space. Early detection and management are critical for attaining a better prognosis.
The following pictorial review discusses the various plain X-ray radiographic findings that indicate a gastric leak. These findings may be overlooked, however, they remain valuable in patients with clinically suspected gastric leaks. This pictorial review illustrates the spectrum of findings related to post-SG gastric leak encountered in plain X-ray radiography.
Sleeve gastrectomy (SG) is the most common type of obesity surgery worldwide. Post-SG gastric leak is a rare but fatal complication that is challenging to diagnose and manage. Early diagnosis and management lead to a better prognosis. Late diagnosis and management can lead to chronic difficulties in healing fistulas, and sepsis that may result in septic shock and even death.[1,2]
Post-sleeve gastrectomy gastric leak commonly occurs at the gastroesophageal junction. This gastric leak causes an inflammatory process mostly seen in the left subphrenic area near the most common site of a gastric leak. This unique location causes variable symptoms in the patient, including chest and upper abdominal symptoms.[1,3] Majority of patients develop intermediate (3-14 days) to late (more than 14 days) postoperative gastric leak (98.75%). Early gastric leak constitutes only 1.25% of the reported postoperative gastric leak. For that reason, intraoperative tests like gas or methylene blue tests are negative. Similarly, early routine postoperative radiology examinations like early CT and upper gastrointestinal contrast fluoroscopy on the first and second postoperative days are almost always negative.[3,4]
The most used imaging examinations for symptomatic suspected gastric leak patients are upper gastrointestinal contrast fluoroscopy study and CT. Plain radiography is believed to be of limited value in the detection of post sleeve gastrectomy gastric leak.[5,6] CT is considered the gold standard diagnostic tool, whereas upper gastrointestinal contrast fluoroscopy studies have a high false-negative rate. Although CT is the gold standard, it might not be available at some centers, and it can’t accommodate superobese patients due to limited CT gantry space.[4-6]
Plain radiography has been a well-known screening examination for several years in medical practice due to its availability, speed, low cost, and low radiation dose. It is the most requested radiological investigation in the emergency department for acute abdomen requiring admission. The American College of Radiology (ACR) guidelines for plain radiography indications include the evaluation of pneumoperitoneum and follow-up of postoperative patients.
A retrospective review of 88 patients with post-SG gastric leak based on CT diagnosis was conducted. The median date of presentation was 13 postoperative days ranging from 5-62 postoperative days. Most patients presented with suspected clinical gastric leak post-SG underwent plain radiography of the abdomen or chest as an initial evaluation. These radiographs were retrospectively evaluated in correlation with the CT abdominal examination and revealed abnormal findings in most radiographs.
In this pictorial review, we illustrate the plain X-ray radiographic findings in correlation with the CT abdominal findings commonly seen in patients with post-SG leaks [Table 1].
|Abdominal findings||Chest findings|
|Free air under the diaphragm||Left pleural effusion|
|Localized air under the left diaphragm||Elevated left diaphragm|
|Left basal lung consolidation/collapse|
Following sleeve gastrectomy, abdominal X-ray radiograph shows a stapler line of hyperdense surgical material and absence of gastric fundus gas bubble [Figure 1]. Chest radiography showed unremarkable findings. Pleural effusion and lung consolidation or collapse are not expected postoperatively [Figures 2].
Free air under the diaphragm
Localized air under the left diaphragm (pseudo gastric bubble sign)
Elevated left diaphragm
Gastric content leakage causes an inflammatory reaction that leads to phlegmon or abscess formation commonly seen in the left subphrenic area. The left hemidiaphragm can be elevated secondary to the subphrenic phlegmon reaction, localized peritonitis, and abscess [Figure 6].
Left pleural effusion
Left pleural effusion is the most common chest complication following SG, and it is highly associated with postoperative complications, especially gastric leaks. It is usually mild, appearing as blunting of the costophrenic angle [Figure 7].
Left basal consolidation/collapse
Left subphrenic collection and abscess formation secondary to gastric leak can cause irritation to the diaphragm or erosion and extension into the left pleural cavity or lung, appearing as left lung basal consolidation or atelectasis [Figures 8 and 9].
Plain X-ray radiograph of abdomen and chest can show findings of post sleeve gastrectomy intermediate to late gastric leak. This illustration may help radiologists and physicians to be familiar with different radiological findings. There is a potential role of plain X-ray to be used as a screening test for asymptomatic patients on fifth to ten postoperative days to detect intermediate gastric leaks that need further research to validate it.
We illustrated multiple plain radiographic findings associated with post-SG gastric leaks in this pictorial essay that can be seen in the initial evaluation [Figure 10]. These findings may aid in the detection and stratification of patients before definite diagnosis using CT or upper gastrointestinal contrast fluoroscopy study.
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Patient consent is not required as the patient’s identity is not disclosed or compromised.
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Conflicts of interest
There are no conflicts of interest.
- ACR-SPR practice guideline for the performance of abdominal radiography. Available from: http://www.acr.org/-/media/ACR/Files/Practice-Parameters/radabd.pdf?la=en