 Palestinians have one of the largest known populations of primary ciliary dyskinesia, Pcd, worldwide. This study examined the genetics and clinical characteristics of this population, finding that 100% of patients were homozygous for their mutations, and that 93% of patients were of consanguinous descent. The majority of patients also exhibited signs of wet cough, neonatal respiratory distress, and situis inverses. Additionally, lung function was already impaired at diagnosis, and growth was mostly within the normal range. Finger clubbing was present in 19% of patients. This article was authored by Nisreen Ramman, Mammouda Farsad, Kareem Drissons, and others.