“…Additional documented sites include lung (Corrin et al 1985), mediastinum (Vonschweinitz et al 19901, Meckel's diver-ticulum (Crawford & Cotran 1994), mesocolon (Iuchtman & Auslander 1991 and rectum (Gugulski et al 1994 PO Box 147,Liverpool L69 3BX,UK, man. Examples include: mucosal haemorrhage and inflammation (Crawford & Cotran 1994); hepatic duct and gastrointestinal tract obstruction [Schu et al 1988, Wurfel & Riebel 1992; hiatal hernia (Guillou et al 1994) and gastroduodenal prolapse [Allison et al 1995). These complications can occur when histologically normal heterotopic pancreas or neoplasms arising from heterotopic tissue are located in the wall of a viscus.…”