2024 Friday Quiz 14 Answer | Figure 1

CincyKidsRad

Cincinnati Children's Radiology

2024 Friday Quiz 14 Answer

Axial (Image 1) and coronal (Image 2) images from a CT angiogram show an arteriovenous malformation, AVM (arrow), at the left temporoparietal junction. The AVM is supplied by small branches of the left posterior cerebral artery and drains via a large varix (arrowhead). Digital subtraction angiography confirms the diagnosis. Cerebral arteriovenous malformations, considered developmental anomalies, are the most frequent common cause of spontaneous intracranial hemorrhage in children. One-third of such malformations bleed before age 20.

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Axial CT (image 1) shows a parenchymal hemorrhage (arrow) within the right parietal lobe. Subsequent axial contrast-enhanced CT (image 2 and 3) show innumerable blood vessels within the right parietal lobe. Digital subtraction angiography (Image 4) highlights the vascular anomaly consistent with cerebral proliferative angiopathy. Cerebral proliferative angiopathy is a vascular lesion with diffuse intravascular shunting. It is differentiated from an arteriovenous malformation by normal intervening brain parenchyma.

Coronal maximum intensity projection from a chest CT (image 1) demonstrates a pulmonary arteriovenous malformation (arrow), confirmed with pulmonary angiography (images 2 and 3). Pulmonary arteriovenous malformations, which are abnormal connections between the pulmonary artery and vein, create an intrapulmonary right-to-left shunt. They are more common in patients with hereditary hemorrhagic telangiectasia.

AVM in left upper limb, 22-year-old male patient, evolution of the arteriovenous malformation since age 12, persistent pain, muscle fatigue and bone weakness. Difficulty in accessing treatment due to socioeconomic factors and the public health system. Peru.

Axial CT angiogram of the head shows a large right-sided arteriovenous malformation (AVM). Intracranial vascular malformations, such as an AVM, are the most common cause of pediatric intracerebral hemorrhage. Other risk factors include patients who are anticoagulated (such as those on extracorporeal membrane oxygenation or ECMO) and brain tumors. #FridayQuizDay #Quiz #FridayQuiz

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