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Patients who have undergone a Fontan's procedure have an abnormal circulation that presents a unique challenge when performing computed tomography pulmonary angiograms. In a standard imaging protocol, contrast is injected into the upper limb veins that feed into the superior vena cava. In Fontan's patients the Computed tomography pulmonary angiograms bypasses the heart and preferentially fills the right lung, with only a small amount of mixture of contrast and noncontrast blood in the pulmonary arteries. In this article, we present the case of a 35-year-old female complaining of chest and abdominal pain with oxygen saturations of 85% on room air. Computed tomography pulmonary angiograms showed suboptimal imaging of the left lung and apparent filling defects in the right lung suggesting a radiological diagnosis of a pulmonary embolism. The abnormal flow and distribution of contrast in the pulmonary arteries can result in a false positive diagnosis of pulmonary embolism. To overcome this, experts advise using a dual-injection of contrast via upper and lower limb central veins to achieve optimal imaging.

A 17-year-old girl was admitted with acute abdominal pain, vomiting and a leucocytosis, and was initially thought to have appendicitis. She underwent laparoscopic appendicectomy, where the tip of the appendix was noted to be mildly inflamed and she was discharged home the day after surgery. Two days later, she re-presented with small bowel obstruction which was subsequently demonstrated to be due to ingestion of five magnetic beads. She required a laparotomy and small bowel resection to resolve the obstruction, but has since fully recovered. This case highlights the potential intestinal complications caused by the intake of magnetic objects, and based on a literature review a number of recommendations are made to guide clinicians when managing similar cases.