CHAPTER XIX 



LAMENESS RESULTING FROM FRACTURE Ol 

 THE PELVIS. 



History. — Sudden lameness following unexpected turning 

 of the horse, falls, jumping, slipping and collisions. 



1. — Fracture of the External Angle of the Ilium. 



Inspection. — Lameness (swinging-leg lameness) is hardly 

 ever wanting, and the thigh is adducted. Standing on level 

 ground the animal is able to bear an equal amount of 

 weight upon both legs. A bruise may be seen about that 

 region in recent cases, swelling appearing later. The angu- 

 lar shape of the tuberosity is changed into a rounded one, 

 best seen by comparing both sides from above, th.^ affected 

 being the narrower. 



Palpation. — There is no crepitation, but pain on pressure 

 over the fracture. 



2.— Fracture of the Shaft of the Ilium. 



Inspection. — Swinging-leg lameness. The affected croup 

 is lower than the other (the sound one) ; especially the exter- 

 nal angle of the ilium of the fractured side appears sunken. 

 This is seen by putting both hind legs into the same position, 

 if possible, and comparing the gluteal regions, either by 

 standing a little behind the animal or by looking at them 

 from above. 



Palpation. — Occasionally pressure upon the external 

 angle of the ilium excites mobility and crepitation, but this 



