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204  SECTION I  III  The Birds








































                             A







































                                                B
                    Figure 19-4  •  Crow with a partial esophageal obstruction. A, Close-up lateral and ventrodorsal (B) views of the proximal esophagus show
                    moderate localized swelling that is displacing the trachea in a ventromedial direction. C, A ventrolateral sonogram shows what appears to

                    be a well-defined accumulation of pus with air at its center and along its perimeter. D, Close-up lateral and ventrodorsal (E) esophagrams
                    reveal contrast retention coincident with the aforementioned swelling. The lesion proved to be an abscess in the wall of the esophagus.







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