Computer Tomography (CT)
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Computer Tomography (CT) Scan Case Study #9
斑點犬 Dalmatian
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Dalmatian, Male, 6 years old
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Clinical History:
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Ear tumor and chronic moist productive cough.
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Findings:
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A large broad-based and exophytic like heterogeneous soft tissue mass is extending from the dorsal ear pinna. It shows a lacy architecture with central hypoattenuating regions. It is associated with marked thickening of the entire external ear canal wall. These result in nearly complete obstruction to the entrance into the ear canal and obliteration of the lumen of the ear canal. Dystrophic calcification in the horizontal ear canal wall are seen as highly attenuating speckles. After contrast administration, the mass is heterogeneously diffusely enhancing and the ear canal wall is diffusely enhancing.
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The right ear canal present also thickening, dystrophic calcification speckles and diffuse enhancement.
The middle and inner ears are within normal variations on both sides.
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There is no sign of extension within the adjacent soft tissues.
Mild ill-defined and partially mineralized brush like periosteal bone formation is observed on the left petrosal bone.
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The left retropharyngeal lymph nodes are slightly enlarged and are similar in signal attenuation as the contralateral ones.
The right retropharyngeal and all submandibular lymph nodes are within normal variations.
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Conclusion:
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1. Left ear pinna broad based exophytic heterogeneous and well-vascularized soft tissue mass with aggressive type appearance.
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2. Bilateral chronic epithelia/glandular hyperplasia of the ears with dystrophic calcification.
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3. Ipsilateral retropharyngeal lymphadenopathy.
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***The above case is for reference only. If you have any questions concerning your pet's condition, please discuss with your veterinarian. ***
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Post contrast image showing the heterogeneous enhancing mass obliterating nearly entirely the opening to the ear canal.
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Dorsal MPR post contrast image showing the broad based mass.
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Post and pre contrast image showing the diffuse enhancement of both the mass and the thickened ear canal walls. (Left: post contrast; right: pre contrast)
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