title: Pulmonary arteriovenous malformations in hereditary hemorrhagic telangiectasia: a series of 126 patients.
abstract: Hereditary hemorrhagic telangiectasia (HHT) is a genetic disorder characterized by epistaxis, telangiectasia, and visceral vascular manifestations. Infectious and ischemic central nervous system (CNS) manifestations due to embolism through pulmonary arteriovenous malformations (PAVMs) represent the main causes of morbidity. To improve the phenotypic characterization of HHT with PAVM, we conducted a retrospective multicenter study of patients with HHT and at least 1 PAVM detected by chest computed tomography (CT) and/or pulmonary angiography, with particular attention to CNS and infectious manifestations. The study included 126 patients (47 men, 79 women), with a mean age of 43.1 +/- 17.4 years; 45 patients had a mutation of the ENG gene and 16 had a mutation of ACVRL1. PAVMs were diagnosed as a result of systematic screening procedures (29%), incidental imaging findings (15%), dyspnea (22%), or CNS symptoms (13%). The PAVMs were diagnosed at a mean age of 43 +/- 17 years, with a linear distribution of diagnosis between 20 and 75 years. Dyspnea on exertion was present in 56% of patients. Four patients had a hemothorax, including 1 during pregnancy. Fifty-three CNS events directly related to HHT (excluding migraine) were observed in 35% of patients: cerebral abscess (19.0%), ischemic cerebral stroke (9.5%), transient cerebral ischemic attack (6.3%), and cerebral hemorrhage (2.4%). The median age of onset was 33 years for cerebral abscesses (range, 11-66 yr), and 53.5 years for ischemic cerebral events (range, 2-72 yr). Migraine was reported in 16% of patients. The diagnoses of PAVM and HHT were made at the time of the cerebral abscess in 13 cases (54%). Forty-three percent of patients were hypoxemic at rest. Contrast echocardiography showed intrapulmonary right-to-left shunting in 87% of tested patients. PAVMs were seen on chest radiograph in 54% of patients, and on the CT scan in all patients. One hundred five patients (83%) underwent treatment of the PAVM, by percutaneous embolization (71%) and/or by surgical resection (23%). A high frequency of CNS and infectious complications was observed in this large series of patients with HHT-related PAVM. Physicians may not be sufficiently aware of the clinical manifestations of this orphan disorder. Patients diagnosed with HHT should be informed by physicians and patient associations of the risk of PAVM-related complications, and systematic screening for PAVM should be proposed, regardless of a patient's symptoms, familial history, or genetic considerations.
authors.affiliation: Centre de Référence pour les Maladies Orphelines Pulmonaires (VC, JFC), Hôpital Louis Pradel, Université Lyon I, UMR 754 INRA-ENVL-UCBL IFR 128, Lyon; Hôpital A. Paré (TC), Boulogne; Hôpital Tenon (AL), Paris; Hôpital de Rennes (RC), Rennes; Hôpital Ste Marguerite (MRG), Marseille; Service de Génétique-Centre de Référence pour la Maladie de Rendu-Osler (HP), Hôpital de l'Hotel-Dieu, Lyon; Réseau de Recherche sur la Maladie de Rendu-Osler (VC, TC, RC, HP, JFC), France; and Clinique Universitaire de Mont-Godinne (EM), Yvoir, Belgium.
authors.forename: Vincent
authors.initials: V
authors.lastname: Cottin
authors.forename: Thierry
authors.initials: T
authors.lastname: Chinet
authors.forename: Armelle
authors.initials: A
authors.lastname: Lavolé
authors.forename: Romain
authors.initials: R
authors.lastname: Corre
authors.forename: Eric
authors.initials: E
authors.lastname: Marchand
authors.forename: Martine
authors.initials: M
authors.lastname: Reynaud-Gaubert
authors.forename: Henri
authors.initials: H
authors.lastname: Plauchu
authors.forename: Jean-François
authors.initials: JF
authors.lastname: Cordier
mesh_terms: D000038:Abscess / Q000209:etiology / Q000503:physiopathology; D000293:Adolescent; D000328:Adult; D000368:Aged; D001165:Arteriovenous Malformations / Q000175:diagnosis / Q000209:etiology* / Q000503:physiopathology / Q000628:therapy; D002490:Central Nervous System / Q000503:physiopathology; D002648:Child; D004452:Echocardiography; D005260:Female; D006403:Hematologic Tests; D006801:Humans; D008168:Lung / Q000002:abnormalities* / Q000098:blood supply / Q000000981:diagnostic imaging / Q000503:physiopathology; D008297:Male; D008875:Middle Aged; D013902:Radiography, Thoracic; D011877:Radionuclide Imaging; D012129:Respiratory Function Tests; D012189:Retrospective Studies; D013683:Telangiectasia, Hereditary Hemorrhagic / Q000150:complications* / Q000503:physiopathology; D013923:Thromboembolism / Q000209:etiology; D020246:Venous Thrombosis / Q000209:etiology