title: [Histological and electron microscopy studies on the adenocarcinomatosis of laying hens].
abstract: Histological examination of 187 tumours from 98 hens (laying hybrids of various lines, age 80-123 weeks) showed that highly-differentiated tubulo-alveolar adenocarcinoma was present in 95% of the birds; in 20% it had a scirrhus structure. Histological and ultrastructural features of these carcinomas and their tendency to form secretory granules pointed to an origin from the protein-secreting part of the oviduct (magnum). In the remaining 5% of birds there were non-specific adenocarcinomas (probably ovarian carcinoma) and mesotheliomas.
mesh_terms: D000230:Adenocarcinoma / Q000662:veterinary*; D002282:Adenocarcinoma, Bronchiolo-Alveolar / Q000473:pathology / Q000662:veterinary; D000818:Animals; D002645:Chickens; D003238:Connective Tissue / Q000473:pathology; D007413:Intestinal Mucosa / Q000473:pathology; D007414:Intestinal Neoplasms / Q000473:pathology / Q000662:veterinary; D008206:Lymphatic Diseases / Q000473:pathology; D008643:Mesentery / Q000473:pathology; D008654:Mesothelioma / Q000473:pathology / Q000662:veterinary; D010057:Oviducts / Q000473:pathology; D011201:Poultry Diseases / Q000473:pathology*
vernacular_title: Histologische und elektronenmikroskopische Untersuchungen zur Adenokarzinomatose der Legehennen