Hereditary Haemorrhagic Telangiectasia Cerebrospinal Localization in Adults and Children

Abstract

Cerebral arteriovenous malformations (CAVM) can be associated with Hereditary Haemorrhagic Telangiectasia (HHT), adominantly inherited vascular disorder with variable penetrance and expressivity. The presentation and angiographic features were analysed retrospectively. The purpose is to point to special groups of AVM patients within the overall CAVMs and to discuss the issue of screening.

We reviewed 34 cases of HHT -related CAVM from the data bank in Bicêtre from 1985–2003. In Spinal cor d AVM (SCAVM) there were 194 patients with 5 HHT. HHT was diagnosed when at least two criteria were met; cutaneous telangiectasia, epistaxis, visceral AVMs, angiographic findings of AVF and first degree family history.

Intracranial haemorrhage was the presenting symptom in 8.8% and the risk of haemorrhage in the natural history was 0.7% per year. The commonest angiographic features in adults are nidus (81.8%) and multiplicity (45.5%), while in the paediatric group venous ectasia and giant pouches (91.3%), AVF (69.6%) and multiplicity (52.2%). In spinal cor d lesions macrofistulas are demonstrated in 83% of HHT with no multiplicity.

HHT-related CAVMs present as multiple lesions, cortical in location, micro AVMs or AVF. HHT in SCAVM is expressed as single macro AVF, especially in the paediatric group. AVF in children are highly suggestive of HHT. We do not recommend screening in HHT adult patients for CAVM, while in the paediatric population, screening could be recommended at six months of age for cerebrospinal localization. These patients should be screened for Pulmonary AVF, which needs to be treated in priority.

Keywords

hereditary haemorrhagic telangiectasia (HHT)Rendu-Osler Weber (ROW)cerebral arteriovenous malformations (CAVM)spinal cord arteriovenous malformations (SC AVM)children intracranial haemorrhage (ICH)

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