The "horseshoe" lung: six new cases.

Six cases of horseshoe lung have been found in a group of 147 scimitar syndrome cases collected in a cooperative multicenter study. These cases were associated either with the severe infantile or with the benign adult form of the scimitar syndrome. The aim of this paper is to describe the clinical and imaging signs as well as the prognosis of 6 new cases of horseshoe lung in association with scimitar syndrome. The authors conclude (1) that the diagnosis of horseshoe lung may be strongly suspected on standard chest radiographs and confirmed by thoracic CT scan; (2) that the prognosis of scimitar syndrome does not seem to be worse when associated with horseshoe lung.