IMAGING DIAGNOSIS—ENOSTOSIS-LIKE LESION IN THE FEMUR OF A HORSE

Authors: 
SUSANNE M. STIEGER-VANEGAS , HEGE KIPPENES-SKOGMO , EBBA NILSSON
Volume: 
50
Number: 
5
Pages: 
509 - 512
Journal: 
Veterinary Radiology and Ultrasound
Date: 
September/October 2009

An enostosis-like lesion was diagnosed in the left femur of a Swedish Warmblood horse that had a left hindlimb lameness of 3 weeks duration. With scintigraphy using technetium 99m-hydroxymethylene diphosphonate (99m Tc-HDP) a marked regional focal increase in radioactivity was identified in the medullary cavity of the left femur. Radiographically there was a corresponding focal increase in bone opacity in the middiaphysis of the left femur. Histopathologically, a 5 cm area of bone matrix was present in the diaphysis of the left femur and confirmed as an enostosis-like lesion. Enostosis-like lesions should be considered as a source of pain in horses with difficult to localize, moderate to severe chronic lameness.