“…Tissues of entodermal origin are less frequent. Only rarely do they contain the more highly differentiated tissues such as brain tissue [3,6,10,15,20,25,29,32,39,51], pancreatic tissue [6,15,20,32). parathyroid tissue [35], mammary gland tissue [34], hepatic tissue [35,53] and lacrima gland tissue [25].…”