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Small Animal Radiology and Ultrasound: A Diagnostic Atlas and Text

Small Animal Radiology and Ultrasound: A Diagnostic Atlas and Text

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362 <strong>Small</strong> <strong>Animal</strong> Radiolo g y <strong>and</strong> Ultrasono graphy<br />

Fig. 3-132 A 7-year-old male<br />

domestic short-haired cat with<br />

chronic vomiting. A <strong>and</strong> B, The kidneys<br />

are bilaterally enlarged <strong>and</strong><br />

irregularly shaped. Differential diagnoses<br />

include lymphoma, bilateral<br />

renal tumors, polycystic disease, or<br />

acute pyelonephritis. Diagnosis:<br />

Lymphoma.<br />

A<br />

B<br />

deposition of calcium salts on the medullary pseudopapillae. These present as pyramidal<br />

(inverted V) or linear densities. Mineralization of the renal parenchyma at the cortical<br />

medullary junction also may occur <strong>and</strong> will produce a pattern of fine parallel lines at the<br />

cortical medullary junction. Vascular mineralization may also be seen. The vessels can be<br />

recognized because of their linear shape <strong>and</strong> location. Usually, parallel lines representing

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