BILATERAL INTRALOBAR PULMONARY SEQUESTRATION

A 34-year-old male presented with an infected intralobar pulmonary seq uestration of the left lower lobe, Aortography revealed bilateral anom alous systemic arteries, originating in the lower level of the descend ing thoracic aorta, to the lower lobe on each side, The portion of the right lower lobe, which was perfused by the anomalous systemic artery was seen otherwise normal in anatomy without any recognizable sequest ered lung tissue. The patient underwent a left postero-lateral thoraco tomy on June 22, 1994. Each aberrant artery was recognized to take off from a common branch of the descending aorta at the level of the diap hragm. A left lower lobectomy with division of the left aberrant arter y as well as Ligation of the right anomalous artery were done. A posto perative pulmonary perfusion scan depicted normal uptake of radioactiv ity in the right lower lobe, suggesting normal pulmonary arterial perf usion to the area receiving previously the anomalous systemic arterial flow. An anomalous systemic artery perfusing an otherwise normal lung can be classified as one of the forms of intralobar pulmonary sequest ration and could be ligated without resection of the involved area of the lung.