Kartagener's syndrome is a well known classical triad of presentations 
consisting of bronchiectasis, sinusitis and situs inversus. It is now recognized 
that the syndrome is an extreme presentation of primary ciliary dyskinesia, a 
large group of conditions with ultrastructural ciliary defects, leading to poor 
ciliary motility in various organ systems. A case of Kartagener's syndrome is 
presented in an eight year old Thai boy in whom the ultrastructural ciliary 
defects have been examined and described in detail for the first time in 
Thailand. Incomplete lack of dynein arms was recognized. In addition, 
disorientation of ciliary axis was noticed. Due to severe bronchiectatic changes 
of the right lower lobe and right lingular lobe which did not improve despite 
adequate antibiotics, these lobes were surgically removed. The child has done 
well since, but still suffers occasional and recurrent bouts of sinusitis.