ary n ge al ▁( Z en ker ' s )- ▁usually ▁occurr ing ▁in ▁the ▁elder ly , ▁through ▁Kill ian ' s ▁triangle ▁above ▁the ▁cr ic oph ary n ge al ▁mus cle . ▁M ides oph age al ▁E pi ph ren ic - due ▁to ▁d ys function ▁of ▁the ▁lower ▁es oph age al ▁s ph inct er , ▁as ▁in ▁ach al asia . ▁Kill ian - J am ies on ▁di vert icul um - ▁is ▁very ▁similar ▁to ▁a ▁ph ary n ge al ▁es oph age al ▁di vert icul um , ▁differ ing ▁in ▁the ▁fact ▁that ▁the ▁p ouch ing ▁is ▁below ▁the ▁cr ic oph ary n ge al ▁mus cle . ▁Col onic ▁di vert ic ula : ▁Although ▁found ▁incident ally ▁during ▁colon os copy , ▁these ▁di vert ic ula ▁may ▁become ▁inf ected ▁( see ▁di vert icul itis ) ▁and ▁can ▁per for ate , ▁requiring ▁surg ery . ▁Du oden al ▁and ▁jej unal ▁di vert icul ( um | a ): ▁are ▁con gen ital ▁les ions ▁and ▁may ▁be ▁a ▁source ▁of ▁b acter ial ▁over g row th . ▁They ▁may ▁also ▁per for ate ▁or ▁result ▁in ▁abs cess es . ▁R ok it ans ky - A sch off ▁sin uses ▁are ▁di vert ic ula ▁in ▁the ▁gall bl ad der ▁due ▁to ▁chron ic ▁ch ole c yst itis ▁G astr ic ▁di vert ic ula ▁are