From the question on page 620.

Lobectomy was performed. The cut surface revealed a poorly circumscribed yellow to white firm area 9.0×6.5×6.0 cm which included a white necrotic tumorous lesion measuring 6.0×5.5×5.0 cm (fig 1A). A feeding artery, 0.3 cm in diameter, from the descending thoracic aorta was seen nearby. Pathological examination of the consolidated mass was consistent with an intralobar sequestration accompanied by obstructive pneumonia with dense infiltrations of lymphoplasma cells, foamy histiocytes and fibroblasts. The tumour …