Small Animal Radiology and Ultrasound: A Diagnostic Atlas and Text

Fig. 4-73 A 2-year-old female Saint Bernard with lameness of the left
forelimb. There is swelling involving the carpal and metacarpal area as
well as the fourth and fifth digits and extensive bony destruction and
proliferation involving the fifth metacarpal bone. The changes are more
severe proximally; however, the entire shaft of this metacarpal bone is
involved. There is a radiolucent area within the midportion of the third
metacarpal bone (arrow). There is destruction involving the distal end
of the second phalanx of the fourth digit and areas of bony destruction
involving the distal end of the first phalanx of the fifth digit. The multifocal
nature of this lesion and proliferative response are suggestive of
mycotic infection. Diagnosis: Blastomycosis.
A
B
Fig. 4-74 An 8-month-old female Doberman Pinscher with an elevated temperature and reluctance
to walk. Swelling was noted around both carpi and the right tibia. A, Radiographs of the right carpus
demonstrate a swelling in the area of the carpal joint. There is an increase in bony density within the
midportion and distal portion of the right radius. A laminar periosteal response is noted on the caudal
cortex of the radius (arrow). There is a small amount of bony proliferation on the ulna adjacent
to this site. There is an area of increased bone density within the medullary canal of the third
metacarpal bone. B, A marked increase in medullary density is present within the midshaft tibia.
There is a laminar periosteal proliferation on the cranial and medial cortex of the tibia and a less regular
area of periosteal proliferation on the caudal lateral aspect of the tibia. Multifocal areas of
increased density with periosteal proliferation in a dog of this age are indicative of an infection. The
dog lived in the lower Sonoran Desert. Diagnosis: Coccidioidomycosis.