Small Animal Radiology and Ultrasound: A Diagnostic Atlas and Text

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Chapter Four The Appendicular Skeleton 587 Fig. 4-140 A 12-year-old female Labrador Retriever with a soft, somewhat fluctuant mass in the area of the right carpus. The dog was not lame. An area of swelling is present on the caudal medial aspect of the right carpus. This swelling has a fat-dense center and a tissuedense border. Diagnosis: Lipoma. Fig. 4-141 A 7-year-old neutered male Miniature Schnauzer with a swelling in the right hind limb distal to the stifle. The lateral radiograph of the area reveals a well-marginated, fat-dense structure (arrows) between the gastrocnemius muscles and the deeper muscles of the tibia. Diagnosis: Lipoma.
588 Small Animal Radiolo g y and Ultrasono graphy S U B C U TA N E O U S A N D I N T R A A RT I C U L A R G A S The most common cause of gas or air accumulation within the soft tissues is an external wound. In rare cases, gas may accumulate in the subcutaneous tissues secondary to infection. Regardless of cause, gas usually accumulates or dissects along fascial planes and appears as linear radiolucencies. 669,670 Large gas pockets may be seen occasionally. Intraarticular gas accumulation may occur with laceration from compound fracture. Its presence suggests the possibility of septic inflammation. Another cause of intraarticular gas is the vacuum phenomeon. 671,672 This is usually due to abnormal radiographic positioning stresses or joint instability. S O F T-TISSUE M I N E R A L I Z AT I O N Soft-tissue mineralization or calcification may result from dystrophic or metastatic mineralization. 326,673,674 Tumors, chronic infections, and hematomas may calcify and produce discrete areas of mineral density. 675,676 Ossifying myositis, which is progressive ossification of muscle and connective tissue, may be seen also. 677-681 The pattern of mineralization is not specific, and the size, shape, and location of the entire lesion, including its soft-tissue component, are important in determining a radiographic diagnosis. Endocrinopathies, Fig. 4-142 A 9-year-old neutered male Shar Pei was evaluated for an acute lameness of the left hind limb. The lateral radiograph of the tarsal region reveals multiple pairs of fine, parallel calcifications caudal to the metatarsal bones (arrows) as well as lateral to the fibula and caudal to the tibia. Serum analysis revealed significant hypothyroidism. Diagnosis: Vascular calcification secondary to hypothyroidism. The lameness was due to a stifle injury.
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SAUNDERS An Imprint of Elsevier Sci
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C H A P T E R O N E Introduction GE
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Chapter One Introduction 3 Fig. 1-1
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metal. Soft tissues or organs surro
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Inadequate penetration will result
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Chapter One Introduction 9 signal i
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Chapter One Introduction 13 Mach ba
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Chapter One Introduction 17 indicat
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Chapter One Introduction 23 24. Lev
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26 Small Animal Radiolo g y and Ult
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A B C Fig. 2-63 A 10-year-old male
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Fig. 2-101 A 7-year-old male mixed
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Fig. 3-234 A 7-year-old female Brit
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Fig. 4-59 A 9-year-old female Russi
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Fig. 4-73 A 2-year-old female Saint
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Page 537 and 538: 536 Small Animal Radiolo g y and Ul
Page 551 and 552: Fig. 4-97 A 10-year-old male mixed
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I N D E X A Abdomen, abnormal prese
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Index 729 Bone, cysts of, 525-527,
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Index 731 Ear, abscess of—cont’
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Index 733 Hydrocephalus—cont’d
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Index 735 Lungs. See also Pulmonary
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Index 737 Pregnancy, determination
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Index 739 S-shaped aortic deformity
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Small Animal Radiology and Ultrasound: A Diagnostic Atlas and Text

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