Malignant melanomas causing Horner's syndrome in a horse.
D000818:Animals; D006732:Horner Syndrome / Q000209:etiology / Q000662:veterinary*; D006734:Horse Diseases; D006736:Horses; D008297:Male; D008545:Melanoma / Q000150:complications / Q000662:veterinary*; D013899:Thoracic Neoplasms / Q000150:complications / Q000662:veterinary*