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Stingray injuries are usually reported from coastal regions. The injury is caused by the tail spine of the stingray, which can penetrate deep into the soft tissues, and the venom in the tail can cause extensive tissue damage. Imaging plays a very important role in patients with stingray injuries, especially to detect the presence of retained foreign bodies and its complications. We present three cases of stingray injuries to the extremities, with a special emphasis on radiographic findings. Embedded foreign bodies that were radiographically visualized were removed in two of the patients (one patient was discharged at request and was lost to follow-up). We also discuss the types of injuries, clinical presentation, importance of imaging and management considerations in stingray injuries.

Dental prosthesis is an uncommon ingested non-food foreign body in adults. Once swallowed, it can lead to serious complications and morbidity. Hence, early localization of the offending foreign body is crucial for timely management. As the dentures are usually made up of non-metallic material and often impacted at or below the level of C7 vertebra, conventional radiograph has limited role in their evaluation. We describe the clinical history and imaging findings of swallowed partial dentures in four patients who presented to the emergency department. The dentures were localized using unenhanced CT of the neck that showed the characteristic mildly hyperdense curvilinear or irregular appearance of the dentures within the upper esophagus. Multiplanar CT reconstructions provide an orientation of the ingested denture within the esophagus, thus guiding the endoscopist.

Computed tomographic (CT) pulmonary angiography is widely used for evaluation of pulmonary embolism. Intraluminal filling defects in the contrast enhanced pulmonary arteries are considered diagnostic of pulmonary emboli. We report a false-positive case where filling defects in the pulmonary artery were due to mixing of blood from a complex shunt or vascular malformation between the systemic arteries and pulmonary artery.

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A 56-year-old man presented to the Accident and Emergency Department with severe right-sided pleuritic chest pain of sudden onset since the previous night. There was exacerbation of pain on movement, with associated shortness of breath, and a mild fever. He had a history of air travel of five hours' duration ten days prior to presentation. A chest radiograph (Fig. 1a) was done, followed by computed tomography pulmonary angiography (CTPA) (Fig. 2). The plasma D-dimer level was raised at 5.28 mg/L fibrinogen equivalent units (normal < 0.55 mg/L).Comparison was made with a chest radiograph (Fig. 1b)

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