Foreign body ingestion is a fairly common clinical problem. The clinical course and resultant management is typically uncomplicated and will usually be predicted from the characteristics of the foreign body itself. However, an abnormal gastrointestinal tract segment can result in a complicated outcome. This article demonstrates such an example when an ingested foreign body that should have passed uneventfully, instead caused colonic obstruction by obturating a previously asymptomatic colon carcinoma. A 70 year old gentleman presented to the emergency department with onset of abdominal pain a few days following accidental ingestion of his dental crown. An initial plain abdominal radiograph followed immediately by a contrast enhanced abdominal MDCT showed an intraluminal metallic density foreign body, compatible with the ingested crown, causing obstruction at the splenic flexure lodging at a 3cm focal "apple core" lesion. Rapid decompression via expedited colonoscopy and placement of a colonic stent was then facilitated. Acute colonic obstruction due to accidental ingestion of a foreign body is rare. Plain film radiography may suffice for imaging of the uncomplicated foreign body ingestion. However, CT scanning, with the added technical development of 3D reconstruction capability can provide critical information in certain circumstances. with an ileosigmoid anastomosis 2 weeks later. A total of 46 biopsied lymph nodes were negative for malignancy and the patient referred to oncology service for further cancer planning and treatment.
Keywords:Figure 1: Upright abdominal radiograph demonstrates a metallic foreign body in the left upper quadrant (*). In addition, there is both distended colon (C) coursing back from the area of the splenic flexure as well as dilated small bowels loops all with air fluid levels. These findings point toward a colonic obstruction with the origin near the splenic flexure.
DiscussionMost foreign body ingestion in the adult is accidental and usually related to some mental impairment, being edentulous, or having dentures. However, prisoners seeking secondary gain and drug smugglers will intentionally swallow foreign bodies. In general, the ingested material has a high likelihood of passage without significant intervention. Even so, the initial clinical management requires definition of the foreign body's physical characteristics and position [3] usually obtained by imaging. If the foreign body is very likely radiopaque, per history, plain radiographs can be used to assess the foreign body(s) appearance and also confirm its initial position. Subsequent radiographs can then be judiciously used to follow the object's travel and document its eventual elimination. CT may be necessary if the foreign body is less radiopaque (fish bones, chicken bones, thin metal or aluminum objects, plastic, or wood) or if there is question of possible complication (gastrointestinal tract impaction, obstruction or perforation) [3]. The addition of 3D rendering with CT can be very helpful [4]. A foreign body...