title: Mastocytoma in the third eyelid of a dog.
mesh_terms: D000818:Animals; D004283:Dog Diseases; D004285:Dogs; D005142:Eyelid Neoplasms / Q000662:veterinary*; D005260:Female; D012515:Mast-Cell Sarcoma / Q000662:veterinary*; D009541:Nictitating Membrane