Ursine hibernation uniquely combines prolonged skeletal unloading, anuria, pregnancy, lactation, protein recycling, and lipolysis. This study presents a radiographic and biochemical picture of bone metabolism in free-ranging, female American black bears (Ursus americanus) that were active (spring
Apart from an occasional focal lesion, ureteral metastases diagnosed during life are rare. We have encountered, on intravenous urography and retrograde pyelography, a rather characteristic appearance of multiple undulating areas of narrowing produced by diffuse lymphatic involvement of the