Obstetrical and neonatal complications in hereditary haemorrhagic telangiectasia: A retrospective study

OBJECTIVE: To retrospectively describe a large series of pregnancies in women with hereditary haemorrhagic telangiectasia followed in our reference centre, plus neonatal outcomes, to better understand the risks of complications and to improve their prevention. DESIGN: A retrospective descriptive study conducted through a phone questionnaire. SETTING: Reference centre for hereditary haemorrhagic telangiectasia in Lyon, France. POPULATION: Women meeting the following criteria: (1) alive and aged ≥18 years; (2) with a definite clinical and/or genetic diagnosis of hereditary haemorrhagic telangiectasia; and (3) with at least one full‐term pregnancy. MAIN OUTCOME MEASURES: Maternal and perinatal outcomes of pregnancies in women with hereditary haemorrhagic telangiectasia. RESULTS: Five hundred and sixty‐two pregnancies were reported in 207 women with hereditary haemorrhagic telangiectasia. A total of 271 complications (48.2%) were registered. Of these, 149 (55%) non‐specific complications, 110 (40.6%) non‐severe specific complications and 12 (4.4%) severe specific complications were registered. There were four cases of haemoptysis and two cases of transient ischaemic attack related to pulmonary arteriovenous malformations. Four patients had severe decompensated dyspnoea, related to pulmonary arteriovenous malformations in three cases and to pulmonary arteriovenous malformations associated with severe hepatic arteriovenous malformations in one case. Hepatobiliary necrosis occurred in one case. Epidural or spinal anaesthesia was performed in 139 of 452 deliveries (31%), without complications. There were 12 reports of congenital anomalies in 461 live births (3%). CONCLUSIONS: Most pregnancies in hereditary haemorrhagic telangiectasia women are uneventful; complications are rare but can be severe. Women thus need to be educated about screening and possible pregnancy‐related risks before becoming pregnant.