Acquired anomalous intrapulmonary venous connection secondary to pulmonaryvenous stenosis

An unusual. case of acquired development of anomalous intrapulmonary venous connection with pulmonary venous stenosis is presented. Appearances on a c hest radiograph resembled the "scimitar" sign in a patient with previous su rgery for partial anomalous pulmonary venous return. Spiral CT and pulmonar y arteriography showed stenosis of the right upper pulmonary vein and an an omalous intrapulmonary venous connection between the right upper pulmonary vein and the right lower pulmonary vein. We consider the slow progression o f pulmonary vein stenosis led to anomalous intrapulmonary venous connection as an intrapulmonary collateral.