This category contains 18 posts

Transposition of the Inferior Vena Cava

History: 40 year old with abdominal pain and diarrhea.  Congenital anomalies of the inferior vena cava in about 0.2-0.5% of the population. Left sided IVC, which is this patient’s diagnosis,  is seen in up to 0.5% of the population. Other anomalies besides transposition of the inferior vena cava include azygous continuation of the inferior vena cava, … Continue reading

Fetal Origin of the Posterior Cerebral Artery – My Brain MRI

History: Radiology resident being scanned for a physics lesson has an incidental finding.  This is my brain MRI! The finding is called a fetal origin of the posterior cerebral artery, and it occurs when the embryonic form of the posterior cerebral artery fails to regress. It is a normal variant that occurs on either side … Continue reading

Coronary Artery Disease – Noncalcified Plaque

History: 55 year old male with a history of diabetes, hypertension and hyperlipidemia with atypical chest pain.  On additional images, this patient had a paucity of calcified plaque (his Agatston score placed him at a very low risk for a major cardiac episode) and the majority of his coronary artery disease consisted of noncalcified atherosclerotic … Continue reading

Vasa Previa

History: 25 year old female G5P0 presents for fetal anatomy scan at 19 weeks gestational age.  This is the ultrasound appearance of vasa previa. Vasa previa is when the umbilical cord vessels course across the internal cervical os, putting the patient and baby at risk for hemorrhage during delivery. Vasa previa is seen independently of … Continue reading

Left Middle Cerebral Artery Stroke – The susceptibility vessel sign

History: 65 year old male with acute onset slurred speech and right hemiparesis.  The susceptibility vessel sign is produced by the presence of deoxyhemoglobin within clot obstructing the left middle cerebral artery in this patient. Some articles have suggested this indicates cardioembolic stroke as an etiology.

Left Internal Carotid Artery Occlusion

History: 70 year old male with acute onset right hemiparesis and slurred speech.  On this CT angiogram of the neck, the left internal carotid artery appears completely occluded, however, technically complete arterial occlusion can only be diagnosed on conventional catheter angiogram by ruling out a possible “string sign.”  This patient went on to have a … Continue reading


History: 80 year old female with headache. This is a common area for atherosclerotic calcifications in elderly patients.

Left Middle Cerebral Artery Stroke

History: 65 year old male presents with sudden onset right hemiparesis and slurred speech.  This patient was found to have near complete left internal carotid artery occlusion on a subsequent CT-angiogram of the head and neck. This is a middle cerebral artery stroke.