CASE 28

SIGNALMENT: 2-year-old male Beagle. HISTORY: Acute right rear limb lameness. No history of trauma or potential of being hit by a car. DIAGNOSIS: Radiographs taken by the referring veterinarian show an apparent fracture of the right ilium (Figure 1). The dog was bearing weight upon examination and the lack of apparent additional pelvic fractures prompted further radiographic views (Figure 2).

Figure 1 Radiographs submitted upon referral (VD only ). Note what appears to be a fracture of the ilium. On close examination, no additional fractures can be identified prompting suspicion of the diagnosis.

Figure 2 Additional ventrodorsal view of the pelvis obtained. The os penis is now superimposed over the sacrum and it can be appreciated that the pelvis is intact.

The apparent fracture of the pelvis seen on the initial films is actually the os penis superimposed over the ilium. A partial tear of the cranial cruciate was found along with a grade II medial patellar luxation.     CASE ARCHIVES: Click on Case Archives to access a list of past case features.