Suspected esophageal coin—look again

History and radiographic findings as predictors for esophageal coins versus button batteries

OBJECTIVE

To determine if clinical history and radiographic findings are reliable predictors for coin versus button battery in children presenting with esophageal foreign bodies to accurately guide decision making regarding the urgency of removal.

METHODS

A retrospective chart review was conducted in a single pediatric tertiary care center of all children who presented with suspected coin or button battery esophageal foreign body ingestion from 2017 to 2019. Patients with documented surgical removal, completed consultation notes, and available radiographic studies were included. Descriptive statistical analysis was performed and predictive characteristics of the diagnostic tests were calculated.

RESULTS

139 patients met inclusion criteria for the study. Of 5 patients who had esophageal button batteries removed, clinical history was concerning for button battery in 2; accuracy of 12.35%. However, radiology reports suggested a battery in all 5. The negative predictive value for radiology alone for diagnosis of button battery was 97% with 81% accuracy. The clinical history for coin foreign body was accurate in 85.28% while radiography was 87% accurate. Wait time on average for all coin foreign body cases was 6.3 h. Day cases waited on average 5.5 h while after-hours cases waited a statistically significantly longer 7.5 h (p = 0.006).

CONCLUSION

Button batteries, while clinically important emergencies, are rare esophageal ingestions. Radiography has a strong negative predictive value for button battery. Children whose radiographic studies do not demonstrate concern for button battery could be considered for delayed elective removal. This could allow children to complete a period of observation at home, thereby reducing prolonged in-house wait times prior to operative removal.

Systematic analysis of button batteries', euro coins', and disk magnets' radiographic characteristics and the implications for the differential diagnosis of round radiopaque foreign bodies in the esophagus

OBJECTIVES

Button battery (BB) ingestion can cause life-threatening complications such as esophageal perforation, and mediastinitis. Chest radiography is the method of choice to diagnose BB ingestion. Therefore, an adequate interpretation of X-ray imaging by physicians is mandatory. The study aimed to analyze relevant diagnostic aspects of BB X-ray imaging, and retrospective analysis of the imaging of radiopaque foreign bodies.

METHODS

All commercially available BBs and different foreign bodies such as euro coins (EC) and disk magnets (DM) were listed according to their sizes and compositions. Furthermore, an X-ray analysis of a test set of BBs, ECs and DMs was performed at angles of 0°, 45°, and 90°. Retrospective assessment of radiological characteristics was performed for patients with a round and radiopaque foreign body in the esophagus RESULTS: Only BBs with a diameter of at least 20 mm had a reliable positive double rim sign at scan angles of 90°, and 45°. The step-off effect was visible in all BBs regardless of the diameter. DMs and ECs presented a homogeneous X-ray weakening at all investigated scan angles. In the retrospective analysis all five cases of BB ingestion showed a double rim sign, all fifteen cases of coin ingestion a homogeneous X-ray weakening. A corrugated margin was detected for 10 cent, 20 cent and 50 cent coins.

CONCLUSIONS

BBs with a diameter of at least 20 mm showed, depending on the battery model, a more or less pronounced double rim sign and step-off effect in conventional X-ray imaging. However the double rim sign can be simulated by for example a pot magnet.

Button battery versus stacked coin ingestion: A conundrum for radiographic diagnosis

OBJECTIVES

Given the potential for devastating complications associated with esophageal impaction of a button battery, there is a need to distinguish between a button battery and look-alike stacked coins at the time of presentation. Given there have been no studies analyzing differences in radiographic density between these two entities, the study objective was to determine if a difference exists between esophageal coin and button battery radiographic density on plain radiograph and to describe the operative and treatment course following these two distinct entities of ingestion.

METHODS

Retrospective case series following button battery or stacked coin ingestion in a tertiary care pediatric hospital from 2003 to present. Radiographic density of each button battery and stacked coin was calculated by dividing the foreign body radiographic density by the mean density of two background radiographic sections. Radiographic density of coins versus batteries was compared using t-tests.

RESULTS

There were 22 patients identified with button battery ingestion and 47 with stacked coins. Median (range) radiographic density of button batteries on anteroposterior view was 1.16 (0.37-2.19) x background compared to 1.13 (0.09-2.65) x background of stacked coins, p = 0.198. There was similarly no statistically significant difference in lateral views, p = 0.622.

CONCLUSION

Our study suggests that radiographic density measured on diagnostic x-ray does not prove a reliable adjunctive measure to distinguish an innocuous stacked coin ingestion from the far more ominous button battery and highlights the need for prompt operative evaluation for any suspected button battery ingestion.