A survey of bone disease in the Alpk/AP rat

Bone disease in an outbred colony of Alpk/AP rats over a period of more than 20 years is recorded. The incidence of most conditions, including fracture, necrosis, osteomyelitis, osteitis deformans, renal osteitis fibrosa cystica and neoplasia is rare compared with other species and possible reasons for this low incidence are discussed.