Objective—To determine risk factors for development
of sequestra in cattle and identify factors associated
with a successful outcome.
Procedure—Medical records of cattle treated at veterinary
teaching hospitals in North America were
reviewed. To determine risk factors for osseous
sequestration, breed, age, and sex of cattle with
osseous sequestration were compared with breed,
age, and sex of all other cattle admitted during the
Results—110 cattle were included in the study. Three
had 2 sequestra; thus, 113 lesions were identified.
Most sequestra were associated with the bones of
the extremities, most commonly the third metacarpal
or third metatarsal bone. Ninety-two animals were
treated surgically (ie, sequestrectomy), 7 were treated
medically, 3 were initially treated medically and
were then treated surgically, and 8 were not treated.
Follow-up information was available for 65 animals
treated surgically and 6 animals treated medically.
Fifty-one (78%) animals treated surgically and 5 animals
treated medically had a successful outcome.
Cattle that were 6 months to 2 years old had a significantly
increased risk of developing a sequestrum,
compared with cattle < 6 months old. Cattle in which
sequestrectomy was performed with the aid of local
anesthesia were significantly more likely to undergo 2
or more surgical procedures than were cattle in which
sequestrectomy was performed with the aid of general
Conclusions and Clinical Relevance—Results suggest
that sequestrectomy will result in a successful
outcome for most cattle with osseous sequestration.
(J Am Vet Med Assoc 2000;217:376–383)