Diagnosis and Treatment of Buried Bumper Syndrome
For buried bumper syndrome, diagnose with endoscopy (or contrast study in prone position if endoscopy unavailable), and treat by removing the buried tube with external traction in most cases, reserving endoscopic electrosurgical incision only when the bumper is completely covered by gastric mucosa. 1
Clinical Presentation and Diagnosis
Recognizing Buried Bumper Syndrome
Buried bumper syndrome occurs in 0.3%–2.4% of gastrostomy patients when gastric mucosa grows over the internal bumper, which can migrate through the gastric wall and lodge anywhere along the tract 1. Look for these specific clinical signs:
- Peritubal leakage or infection at the site
- Immobile gastrostomy tube that cannot be rotated or advanced
- Abdominal pain localized to the tube site
- Resistance when infusing formula through the tube
Diagnostic Approach
Endoscopy is the gold standard for diagnosis 1. The endoscopist will directly visualize mucosal overgrowth covering the internal bumper.
If using contrast radiography instead, perform the study with the patient in prone position 1. This critical detail prevents a false-negative result—when supine, contrast may falsely appear to pass through the embedded bumper into the gastric lumen by gravity alone, missing the diagnosis.
Risk Factors to Identify
Patients at highest risk include those with 1:
- Excessive tension between internal and external bolsters (the most preventable cause)
- Malnutrition or poor wound healing
- Significant weight gain after successful enteral nutrition
- Inadequate gastrostomy care 2
Treatment Algorithm
Primary Treatment: External Traction
In most cases (88.9% success rate), simply remove the buried tube with external traction and place a new tube through the existing tract or nearby site 1, 3. This minimally invasive approach:
- Requires no special equipment
- Causes minimal trauma to the gastrostomy tract
- Has been shown safe with no complications in properly selected patients 3
- Can be performed at bedside
The key principle is minimizing trauma to the gastrostomy tract 1.
Secondary Treatment: Endoscopic Incision
Reserve endoscopic intervention only when the bumper is completely covered by gastric mucosa 1. In these cases:
- Use electrosurgical incisions (needle knife sphincterotome) to access the buried bumper 4, 2
- Remove endoscopically and replace the tube
- This approach is successful in nearly all cases when external traction fails 4
Recent data suggests the Balloon Dilation Pull (BDP) technique achieves 92.3% technical success with minimal complications (3.8% adverse event rate), using readily available endoscopic accessories 5.
Surgical Intervention
Surgery is reserved for:
- Failed endoscopic approaches (rare, only 11.1% of cases) 3
- Patients with signs of peritonitis or abscess formation (22.2% present with serious complications) 3
- Evidence of systemic decompensation
Critical Timing Considerations
Contrary to traditional teaching, buried bumper syndrome can occur early—50% of cases develop within the first month after placement 3. This challenges the notion that BBS is exclusively a late complication. Median time to development is 135.9 days, but the range extends from 9 days to over 2 years 3.
Early diagnosis is paramount to prevent serious complications including abscess formation, peritonitis, and mortality (8.3% mortality rate in one series, with 3 of 5 deaths directly attributable to BBS complications) 3.
Prevention: The Most Important Intervention
Maintain approximately 1 cm of play between the skin and external bolster 1. This single measure prevents excessive tension—the primary cause of buried bumper syndrome.
Additional preventive measures:
- Avoid excessive lateral traction on the tube
- Ensure loose contact of outer bolster with skin (not tight)
- Provide proper education to patients' relatives and caregivers 3
- Follow ESPEN guidelines for PEG aftercare 4, 2
Common Pitfalls to Avoid
- Don't perform contrast studies in supine position—this will miss the diagnosis 1
- Don't assume BBS only occurs late—maintain vigilance in the first month 3
- Don't rush to surgery—external traction succeeds in most cases 3
- Don't overtighten the external bolster during initial placement or routine care—this is the most common preventable cause 1