An abdominal teratoma in a domestic goose (Anseriformes,<i>Anser anser domesticus)</i>

Abstract

This article reports a spontaneous teratoma in a domestic goose (Anseriformes, Anser anser domesticus). The mass was found in the caudal abdominal cavity attached by a thin pedicle and consisted of an epithelial-lined cyst. It contained ensheathed but fully formed feathers arising from feather follicles complete with erector muscles and nerves. The capsule was composed mainly of adipocytes with a thin squamous serosa.