A 32-year-old man swallowed a piece of iron wire by mistake approximately 8 weeks
before admission. Computed tomography (CT) of the larynx showed a short, high-density
strip, judged to be a foreign body (about 6 – 8 mm long at level 6/7 of the cervical
vertebra), in the upper esophagus ([Fig. 1]). No abnormal findings resulted from several gastroscopy and laryngoscopy examinations
in the local hospital, indicating that the foreign body was embedded under the mucosal
layer. The patient was very anxious and insisted doctors remove it.
Fig. 1 Computed tomography of the larynx showing high-density foreign body in the wall of
the upper esophagus (at about level 6/7 of the cervical vertebra) (arrow).
We first used endoscopic ultrasound and real-time X-ray monitoring to mark the foreign
body, but both failed due to the foreign body’s difficult position. We therefore endoscopically
fixed three titanium clips at different positions of the upper esophagus based on
the appearance of the previous CT scan and determined the location of the foreign
body by a second CT scan ([Fig. 2]). Endoscopic submucosal dissection (ESD) was then performed just near the esophageal
entrance (1 – 2 cm from the entrance) and the submucosal foreign body was found and
removed ([Fig. 3], [Fig. 4], [Video 1]). The wound was then closed by clips. An additional CT scan was performed 1 month
later, confirming that the foreign body had been removed ([Fig. 5]).
Fig. 2 The position of the foreign body (yellow arrow) was determined by titanium clip (red
arrow) combined with the computed tomography scan of the cervical esophagus.
Fig. 3 The submucosal foreign body with a yellow “coat” exposed after cutting the mucosa.
Fig. 4 The internal metal-like substance exposed after cleaning the surface.
Video 1 Extraction of a missing proximal esophageal foreign body by endoscopic mucosal dissection.
Fig. 5 Computed tomography scan 1 month after endoscopic mucosal dissection showing no evidence
of esophageal foreign body.
Buried submucosal foreign bodies in the esophagus, although very rare, can cause serious
complications [1]. The ESD procedure is safe for a buried and covered foreign body in the esophagus,
and it could be the first choice of treatment [2]
[3]
[4]. However, how to determine the location is crucial.
Endoscopy_UCTN_Code_TTT_1AO_2AL
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