title: Unusual cause of abdominal pain in a filly.
mesh_terms: D000005:Abdomen; D000818:Animals; D005260:Female; D006734:Horse Diseases / Q000209:etiology*; D006736:Horses; D006924:Hymen / Q000002:abnormalities*; D010146:Pain / Q000209:etiology / Q000662:veterinary*