title: Pinealoma in a broiler breeder.
abstract: An incidental central nervous system tumor was found in a broiler breeder. The cellular mass was histologically similar to the normal pineal gland, but it was characterized by a decreased ratio of follicular/parafollicular cells, a relative increase in mitoses, a size three times greater than a normal pineal gland, and growth and expansion into adjacent cerebellar tissue. These characteristics warranted a diagnosis of pinealoma rather than pineal gland hyperplasia.
mesh_terms: D000818:Animals; D001932:Brain Neoplasms / Q000473:pathology / Q000662:veterinary*; D002645:Chickens; D010871:Pinealoma / Q000473:pathology / Q000662:veterinary*; D011201:Poultry Diseases / Q000473:pathology*