If a KUB (Kidneys, Ureters, Bladder) report indicates a 'peg' in the left abdomen, is it related to the stomach?

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Last updated: June 8, 2025View editorial policy

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From the Guidelines

A "peg" seen on a KUB X-ray in the left abdomen is most likely a percutaneous endoscopic gastrostomy (PEG) tube, which is a feeding tube surgically placed through the abdominal wall into the stomach to provide nutrition for patients who cannot eat normally. This conclusion is based on the typical presentation and use of PEG tubes in medical practice, as well as the absence of direct evidence in the provided studies linking the term "peg" in a KUB report to any other common condition affecting the stomach or abdomen. The left abdominal location is consistent with typical PEG placement since the stomach is predominantly located on the left side of the abdomen. PEG tubes are commonly used for patients with swallowing difficulties, neurological conditions, or those requiring long-term nutritional support 1. If you see this finding on your KUB report, it simply indicates the presence of this medical device and is not a cause for concern unless specifically noted as malpositioned or problematic by the radiologist.

Some key points to consider:

  • PEG tubes are made of material that blocks X-ray beams, making them visible on radiographs as radiopaque structures.
  • The term "peg" in a radiology report refers specifically to the feeding tube device itself rather than to normal stomach anatomy.
  • While the PEG tube connects to the stomach, its presence in the left abdomen does not directly relate to stomach pathology but rather to the presence of a medical device for nutritional support.
  • The provided studies, although extensive, do not directly address the interpretation of "peg" in a KUB X-ray report but do offer insight into the management and complications of PEG tubes 1, as well as other abdominal conditions that might be considered in the differential diagnosis but are not directly relevant to the interpretation of a "peg" in this context.

Given the information and the context provided, the most appropriate conclusion is that a "peg" seen on a KUB X-ray in the left abdomen is indicative of a PEG tube, which is a common medical device used for feeding and nutritional support.

From the Research

Understanding PEG in the Context of KUB Reports

  • A KUB (Kidneys, Ureters, Bladder) report indicating a 'peg' in the left abdomen does not directly relate to the stomach in the context of anatomical location, as 'peg' in medical terminology often refers to a Percutaneous Endoscopic Gastrostomy tube.
  • However, the presence of a PEG tube, as discussed in 2, is indeed related to the stomach, as it is a procedure where a flexible feeding tube is placed through the abdominal wall and into the stomach; this allows for direct access for nutritional support.

Relation to Stomach

  • The term 'peg' in a KUB report likely refers to the presence of a PEG tube, which is used for feeding and stomach decompression, as outlined in 2.
  • The stomach's involvement with a PEG tube is direct, as the tube is placed into the stomach to facilitate enteral nutrition, as noted in 3, which highlights a case of long-term PEG tube feeding without complications.

Diagnostic Context

  • While a KUB report might mention a 'peg', this does not necessarily imply a diagnostic finding related to the stomach's function or pathology; rather, it indicates the presence of a medical device (PEG tube) used for nutritional support.
  • For actual stomach-related diagnostics, other imaging techniques like upper gastrointestinal series (UGIS) or computed tomography (CT) scans might be used, as discussed in 4 and 5, which evaluate the utility of these methods in detecting gastric issues post-bariatric surgery.

Clinical Implications

  • The presence of a PEG tube, as indicated by 'peg' in a KUB report, suggests that the patient is undergoing enteral nutrition, which could be due to various reasons such as dysphagia, as mentioned in 6.
  • Understanding the purpose and implications of a PEG tube is crucial for patient care, including recognizing potential complications and the importance of informed decision-making, as highlighted in 2 and 6.

Professional Medical Disclaimer

This information is intended for healthcare professionals. Any medical decision-making should rely on clinical judgment and independently verified information. The content provided herein does not replace professional discretion and should be considered supplementary to established clinical guidelines. Healthcare providers should verify all information against primary literature and current practice standards before application in patient care. Dr.Oracle assumes no liability for clinical decisions based on this content.

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