title: A cluster of choanal atresia.
abstract: During a 5-month period in 1991 four infants with choanal atresia or stenosis were born at one hospital. We therefore reviewed our experience of this condition during the past 6 years and compared the patients who presented before with the four clustered cases. No definite explanation has been ascertained for this cluster of cases of choanal obstruction but a viral or other environmental teratogen could not be excluded.
authors.affiliation: Department of Paediatrics, College of Medicine, Blantyre, Malawi.
authors.forename: J M
authors.initials: JM
authors.lastname: Topley
authors.forename: A H
authors.initials: AH
authors.lastname: Dawodu
authors.forename: M M
authors.initials: MM
authors.lastname: Ammar
mesh_terms: D002648:Child; D002675:Child, Preschool; D002754:Choanal Atresia / Q000453:epidemiology* / Q000209:etiology; D016000:Cluster Analysis; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D015995:Prevalence; D014479:United Arab Emirates / Q000453:epidemiology