... low-pressure PAA complicated by PE. The current case report demonstrates conservative management and inva-sive management of two patients with idiopathic PAAand PAA secondary to pulmonary valve stenosis, ... clinical and radiological follow-up isnecessary, taking into consideration the potentially fatalcomplications.According to the literature, PAA is an unusual lesionwhich can be associated with ... in adults: findings at CT andradiography. AJR Am J Roentgenol 2007, 188:126-134.8. Ritter CO, Weininger M, Machann M, Beissert M, Hahn D, Kenn W: Non-invasive imaging in a rare case of main...