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Auditory Pathology (ear infection) 0002
Transaxial CT (top) (bone window; 1 mm slice) and 3D Shaded Surface Display (SSD) reconstruction (bottom) (0.5 mm slice; 1 mm spiral CT) through the head of a postmortem Beluga Whale (Delphinapterus leucas) with a right ear anomaly (see previous photograph, Auditory Pathology 0001) including absence of a right periotic bone (related report). The absence of a right periotic bone may be due to non-development or a lytic process. The normal left ear of this animal argues against but does not rule out a congenital defect. The absence of the periotic bone, the pitted and corrupted right tympanic, the extensive calcified adhesions, and dense granular material in the peribullar sinus suggest protracted infection. Specimen courtesy Woods Hole Aquarium, Center for Whale Research, D. Rotstein, and New England Aquarium (NEAq).
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