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Revista chilena de pediatría

versión impresa ISSN 0370-4106

Resumen

FASCE, Juan et al. Cerebral sinovenous thrombosis in a newborn with mutation of MTHFR C677T treated with enoxaparin. Rev. chil. pediatr. [online]. 2020, vol.91, n.3, pp.417-423. ISSN 0370-4106.  http://dx.doi.org/10.32641/rchped.v91i3.1270.

Introduction:

Neonatal cerebral sinovenous thrombosis (CSNT) is a rare and generally serious con dition about which there is little knowledge of the responsible pathophysiological mechanisms and, although controversial, it has been suggested that genetic thrombophilia may play a role in its patho genesis. Out of concern for intracranial bleeding, the anticoagulant treatment with low-molecular- weight heparin is controversial.

Objective:

To present a case of a newborn with neonatal CSNT, to analyze the thrombophilic risk factors, and the management of cerebral venous thrombosis with low-molecular-weight heparin.

Clinical Case:

Full-term newborn who presented at eight days of life breastfeeding rejection, clonic seizures, and locomotor hypoactivity. The MRI neuroimaging showed a CSNT involving multiple venous sinuses, a right thalamic hemorrhagic infarction, and venous congestion in frontal white matter. Thrombophilia study highlighted a homozygous MTHFR C677T mutation. Treatment with low-molecular-weight heparin was associated with repermeabilization of the superior sagittal sinus after 23 days of starting therapy.

Conclusions:

The clinical presentation of CSNT in the neonate is nonspecific, probably related to the extent and severity of the injury and the development of associated complications, such as venous hemorrhagic infarctions and intraparenchymal or intraventricular hemorrhage. These complications are detected through ultrasound or MRI, and they should make us suspect a CSNT. In this experience, the anticoagulant treatment proved to be safe and prevents thrombus propagation.

Palabras clave : Neonatal seizures; cerebral sinovenous thrombosis; MTHFR C677T mutation; stroke; anticoagulation.

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