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a Department of Thoracic Surgery, Toronto General Hospital, 200 Elizabeth St, Toronto, Ontario, M5G 2C4 Canada
b Department of Histopathology, The Royal Brompton Hospital, Sydney St, London, SW3 6NP UK
c Department of Cardiothoracic Surgery, The Golden Jubilee Hospital, Clydebank, Glasgow, G81 4HX UK
d The Department of Cardiothoracic Surgery, The Royal Hospital for Sick Children, Dalnair St, Glasgow, G3 8SJ UK
(Email: dgwest{at}rcsed.ac.uk; a.nicholson{at}rbht.nhs.uk; ian.colquhoun{at}gjnh.scot.nhs.uk; jim.pollock{at}yorkhill.scot.nhs.uk).
We read with interest Dr Pusiol and colleagues' [1] letter on congenital cystic intrapulmonary lesions.
Malignant transformation in Stocker type 1 congenital cystic adenomatoid malformation (CCAM) had been well described [2] prior to our report [3]. As few cases have been reported, it may still be premature to describe this relationship as "unequivocal." In addition to its association with bronchioloalveolar carcinoma, CCAM may be a source of recurrent pulmonary sepsis.
Congenital cystic adenomatoid malformation causing respiratory distress can mandate resection in the neonatal period. Debate exists as to the optimal management of asymptomatic CCAM. Conservative management has been reported [4]. However, long-term follow-up of this strategy has not been performed. Therefore, the risk of progression to malignancy and the burden of recurrent sepsis cannot be quantified. The patient in our report suffered recurrent episodes of sepsis until resection by lobectomy.
Surgical resection in these patients can be performed at low risk [5]. On the basis of current evidence, we support Dr Pusiol and colleagues' [1] recommendation that complete surgical resection should remain the treatment of choice for CCAM.
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