title: Mutation spectrum of Egyptian children with cystic fibrosis.
abstract: OBJECTIVE
  To know the common CFTR mutations in the Egyptian patients with cystic fibrosis as it was previously thought to be uncommon disease in Egypt.
  
  
  METHODS
  This is a cross sectional study of 60 patients diagnosed as cystic fibrosis by sweat chloride testing. They were enrolled from the Allergy and Pulmonology Unit Children's Hospital Cairo University. They were screened for the presence of the frequent 36 mutations in Caucasians by reverse hybridization line probe technique, using INNO-LiPACFTR19 and CFTR17 + Tn kits.
  
  
  RESULTS
  Most of patients presented with classic manifestations of CF such as variable pulmonary disease and pancreatic insufficiency, and hepatomegaly with or without ascites. The mutations detected were F508 del (58 %), 2183AA/G (10 %), N1303K (6 %), I148T (4 %), W1282X (4 %), G155D (2 %), CFTRdel2-3 (21 KB) (2 %), 3199del6 (2 %), R347P (2 %). Unique to the Egyptian population are these mutations R1162X and A544E (6, 4 %) respectively they were found in our cohort study and were not reported elsewhere in the Arab population till now. There was no association between the initial clinical presentation of CF and the genotypes detected.
  
  
  CONCLUSIONS
  The F508 del is still the most commonly encountered mutation (58 %), however other rare mutations were identified where each ranged from (2 to 10 %).
authors.affiliation: Department of Allergy and Pulmonology, Children's Hospital, Cairo University, Cairo, Egypt.
authors.forename: Walaa Aboulkasem
authors.initials: WA
authors.lastname: Shahin
authors.affiliation: Department of Clinical and Chemical Pathology, Cairo University, Cairo, Egypt.
authors.forename: Dina Ahmed
authors.initials: DA
authors.lastname: Mehaney
authors.affiliation: Department of Allergy and Pulmonology, Children's Hospital, Cairo University, Cairo, Egypt.
authors.forename: Mona Mostafa
authors.initials: MM
authors.lastname: El-Falaki
keywords: CFTR mutations; Cystic fibrosis; Egypt; F508del