title: Aneurysmal bone cyst in the horse.
abstract: An aneurysmal bone cyst was diagnosed in the distal metaphysis of Mt3 in a 9-month-old-Quarter Horse colt. The lesion developed between the fifth and ninth month of life and clinically appeared as a non-painful swelling which did not cause a lameness. Radiographs of the lesion showed expansion of the cortex and incomplete septa of new bone extending from the cortex into surrounding soft tissue. Surgical intervention revealed a blood filled cavity. The animal died during the immediate post-surgical period. Histopathologic evaluation of the lesion was performed.
mesh_terms: D000818:Animals; D001845:Bone Cysts / Q000209:etiology / Q000473:pathology / Q000628:therapy / Q000662:veterinary*; D006734:Horse Diseases / Q000209:etiology / Q000473:pathology*; D006736:Horses; D008297:Male; D008684:Metatarsus / Q000473:pathology*