Perforation from endoscopic small bowel biopsy

Value of routine duodenal mucosal biopsies in the evaluation of anemia in a large Australian referral centre

Background and Aim

Small bowel mucosal biopsies (SBBx) are routinely performed to investigate unexplained anemia; however, previous studies have demonstrated a low yield in diagnosing celiac disease. Our aim was to determine the yield of routine SBBx in a large cohort of patients who underwent gastroscopy for the investigation of anemia.

Methods

Data from consecutive patients who underwent gastroscopy for the investigation of anemia in a tertiary hospital, from January 2008–December 2011, were prospectively collected. Measured outcomes were the prevalence of celiac disease, the yield of duodenal biopsies, and the correlation between celiac serology and diagnosis.

Results

Over 4 years, 987 patients (385 M:602 F; 48.27 ± 15.89 years) underwent endoscopy for anemia, of which 534 (54.1%) had proven iron deficiency anemia (IDA). Abnormal SBBx consistent with celiac disease were found in 2% (22/987), with a higher prevalence in females (3.2%, n = 19 vs 0.8%, n = 3 in males) and in those with IDA (3.6%, n = 19 vs 0.7%, n = 3 in non‐IDA). Macroscopic endoscopic abnormalities were present in 86% (19/22) of patients with celiac disease. Of the 178 patients who had celiac serology, tissue transglutaminase antibody had the highest sensitivity (80%) and specificity (99%). Combined serology had a sensitivity of 85.7%.

Conclusion

Only 2% of patients with unexplained anemia had abnormal SBBx consistent with celiac disease and even fewer patients in non‐IDA. Given the availability and high sensitivity of celiac serology and macroscopic changes on endoscopy, SBBx should not be routine during endoscopy but should be limited to those with positive celiac serology, abnormal endoscopic appearance, or females with IDA.

Random duodenal biopsy to exclude coeliac disease as a cause of anaemia is not cost-efective and should be replaced with universally performed pre-endoscopy serology in patients on a suspected cancer pathway

BACKGROUND

Random duodenal biopsy to exclude coeliac disease during upper gastrointestinal endoscopy for the investigation of iron deficiency anaemia remains a common procedure, but is expensive and time-consuming. Serological investigation for coeliac disease is also recommended, having excellent accuracy with the added benefit of lower cost. This study sought to examine the utility of duodenal biopsy and coeliac serology in the diagnosis of coeliac disease.

METHODS

A prospectively maintained database was interrogated to identify all patients having upper gastrointestinal endoscopy for the investigation of anaemia between January 01, 2016, and December 31, 2016.

RESULTS

Of the 1131 patients having an endoscopy, coeliac serology was measured in only 412 (36%) and was positive in 9 cases (2%), leading to 6 histological diagnoses of coeliac disease and 3 false positives. Two-hundred and seventy-four patients with negative serology had biopsies taken which were all negative. Only 2/451 (0.4%) patients who had biopsies performed in the absence of a serology test were histologically positive for coeliac disease. The cost per diagnosis of a case of coeliac disease in those with either negative or absent coeliac serology was £18,839 (US$25,244, €21,196).

CONCLUSIONS

Random duodenal biopsy is not a cost-effective method of diagnosing coeliac disease and should be replaced with pre-endoscopy coeliac serology.

Non-cardiac chest pain: a clinical assessment tool

A simple clinical approach to patients presenting with chest pain is outlined, which is easily taught and can be quickly applied. This approach was demonstrated in a large cohort of patients and this article discusses the characteristics of the various diagnostic sub-groups.

Management of iatrogenic perforation

Iatrogenic perforation of the gastrointestinal tract is a medical emergency and is inevitable. An endoscopist must maintain a high index of suspicion despite minimal or atypical symptoms and negative radiologic studies, because perforation is a complication with tremendous morbidity and mortality. The endoscopist must know how to manage this complication appropriately and to seek immediate surgical consultation. There is ongoing controversy about when a patient should undergo nonoperative or surgical therapy. An evidence-based approach to manage iatrogenic perforation is not possible. The trend in the modern era is to less invasive, nonoperative therapy, given advancements in ICU care and antibiotics. Laparoscopy or laparoscopic-assisted (minilaparotomy) surgery is also being increasingly used with outcomes comparable with conventional laparotomy. Experience and advancements in accessories have enabled endoscopic repair of iatrogenic perforation in many situations [84]. The management algorithms provided synthesize the pertinent literature into reasonable guidelines to follow. Ultimately, an individualized approach must be taken to manage the patient with an iatrogenic perforation.

Reducing risks in gastroenterological practice

Eighty five malpractice claims against gastroenterologists have been analysed. Thirty seven (44%) arose from adverse events as a result of endoscopy and 48 (56%) from clinical practice. In 31 (84%) of the endoscopy cases (including all 13 endoscopic retrograde cholangiopancreatographies) there seemed to be significant fault. In nine cases the procedure was not clearly indicated and in 10 recognition and treatment of the adverse event was delayed. In no case had the patient given adequate informed consent. Diagnostic error was responsible for most of the claims related to clinical practice (31 of 48) of which 13 were indefensible. Failure to obtain an adequate history (17 cases) and insufficient awareness of disorders of the small intense (12 cases) were major factors. In 26 cases a key investigation was not performed. Seventeen claims were related to management or treatment but only one of these cases was difficult to defend. Overall, there was evidence of serious fault in 50% of claims. Greater care in selecting patients for endoscopic procedures and in providing postprocedural care would have eliminated the basis of more than half the claims arising from endoscopy. There would have been few claims if properly informed consent had been obtained. Over-ready acceptance of the diagnosis of a functional disorder (for example, irritable bowel, dyspepsia) was the usual cause of delays in diagnosis.

Coeliac disease in the elderly

Of 228 patients with adult coeliac disease, 42 (19%) were diagnosed aged 60 years or over. In this series, of 35 patients who did not have dermatitis herpetiformis, 15 had attended family doctors and hospital outpatient departments for an average of 28 years with unexplained symptoms or abnormalities in blood tests but the diagnosis of coeliac disease had been missed. This is unsatisfactory because these patients can both manage and respond to a gluten free diet. Thirty eight patients complied strictly with the diet with resolution of symptoms. Significant improvement in weight, haemoglobin, albumin, calcium, and alkaline phosphatase values after a year on the diet also occurred. Clinicians should be alert to the possibility of coeliac disease in the elderly particularly in patients with non-specific complaints in the presence of unexplained anaemia.