Cerebral arteriovenous malformations (cAVMs) are traditionally considered as congenital anomalies. However, recent reports have suggested that they may be an acquired disease associated with specific conditions . Herein, we report a unique case of multiple de novo cAVMs associated with liver cirrhosis (LC).
A 33-year-old woman with a history of alcoholic liver cirrhosis presented with a focal seizure, which began with left sided paresthesia followed by tonic posturing. The electroencephalogram was normal. However, the brain magnetic resonance images (bMRIs) and digital subtraction angiography revealed multiple cAVMs (Figures 1A, 1B, 2 and 3), which were not found in the bMRIs acquired seven years earlier (Figure 1C).
We present a very rare case of cAVM that was confirmed to be an acquired form associated with LC. Only two cases of de novo cAVM associated with LC have been reported in the literature [2, 3]. However, unlike the previously reported cases, our patient showed multiple cAVMs, which are known to only occur in 0.3%–4% of all cases of cAVMs, except in cases of hereditary autosomal disease . To the best of our knowledge, this is the first case of multiple de novo cAVMs associated with LC.
Similarly, the AVMs associated with LC have also been reported in organs other than brain, such as the lower extremities , fingers , lungs , and ileocecum . Among these, some cases showed spontaneous regression of AVMs after liver transplantation or recovery of hepatic function [6, 7]. In addition, spontaneously resolving cAVMs after liver transplantation have also been reported .
The de novo appearance and regression of AVMs in relation to liver function may indicate a cause-and-effect relationship between hepatic failure and de novo AVM. The exact mechanism has not yet been clearly elucidated, but there is a persuasive explanation [1, 9]. In cirrhotic livers, surviving hepatic cells release angiogenic factors such as vascular endothelial growth factor into the systemic circulation, promoting a proangiogenic condition.
In addition to LC, other diseases have been associated with de novo cAVMs, including preexisting intracranial vascular malformations, aneurysms, strokes, seizures, brain tumors, moyamoya disease, traumatic brain injury, and inflammatory lesions. Such pathological conditions may elicit a proangiogenic environment, acting as a ‘second hit’ for triggering cAVMs in individuals with genetic susceptibility .
Here, we present a case of multiple de novo cAVMs associated with alcoholic LC. Therefore, in patients with potential risks for de novo cAVMs, including LC, the possibility of multiple de novo cAVMs should be considered, and the images should be carefully reviewed, even if previous brain images are normal.
This study was supported by the Soonchunhyang University Research Fund.
The authors have no competing interests to declare.
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