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Patent foramen ovale (MRI)

The diffusion-weighted image on the right shows hyperintense lesions involving the right anterior and medial thalamus. This hyperintense lesion on diffusion-weighted imaging correlated with decreased diffusion on the apparent diffusion coefficient maps indicative of acute ischemic stroke. The location of the lesion is characteristic of embolic stroke, in this case probably through a patent foramen ovale with right-to-left shunt. (Contributed by Dr. Shadi Yaghi.)

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  • Atrial septal aneurysm
  • Atrial septal defect
  • Cryptogenic stroke
  • Embolic stroke
  • Fat embolism
  • Ischemic stroke
  • Neurologic decompression illness
  • Obstructive sleep apnea
  • Papillary fibroelastoma
  • Paradoxical embolism
  • Platypnea-orthodeoxia syndrome
  • Pulmonary embolism
  • Pulmonary hypertension
  • Right heart failure
  • Thromboembolism
  • Transient ischemic attack
  • Tumor embolism
  • Venous thrombosis