ital ▁anom alous ▁air ▁sac ▁communic ating ▁with ▁the ▁cav ity ▁of ▁the ▁l ary nx , ▁which ▁may ▁bul ge ▁out ward ▁on ▁the ▁neck . ▁ ▁It ▁may ▁also ▁be ▁acquired , ▁as ▁seen ▁in ▁glass b low ers , ▁due ▁to ▁contin ual ▁forced ▁exp iration ▁producing ▁increased ▁press ures ▁in ▁the ▁l ary nx ▁which ▁leads ▁to ▁dil at ation ▁of ▁the ▁l ary n ge al ▁vent ric le ▁( S inus ▁of ▁M org ag ni ). ▁It ▁is ▁also ▁seen ▁in ▁people ▁with ▁chron ic ▁ob struct ive ▁air way ▁disease . ▁ ▁Add itional ▁images ▁ ▁References ▁ ▁External ▁links ▁▁ ▁Category : H uman ▁head ▁and ▁neck ▁Category : C ong en ital ▁dis orders ▁of ▁resp ir atory ▁system <0x0A> </s> ▁A ▁three - part ▁refer endum ▁on ▁a ▁marine ▁reserve ▁was ▁held ▁in ▁E aster ▁Island ▁on ▁ 3 ▁September ▁ 2 0 1 7 . ▁V ot ers ▁were ▁asked ▁whether ▁they ▁approved ▁of ▁the ▁creation ▁of ▁a ▁marine ▁reserve , ▁whether ▁it ▁should ▁be ▁joint ly ▁admin ister ed ▁by ▁a ▁board ▁of ▁six ▁E aster ▁Island ers ▁and ▁five ▁officials ▁representing ▁the ▁national ▁government , ▁and ▁whether ▁fish ing ▁in ▁the ▁marine ▁reserve ▁should ▁be ▁limited ▁to ▁traditional ▁methods . ▁The ▁propos als ▁were ▁the ▁result ▁of ▁a ▁November ▁ 2 0 1 3 ▁dec ree ▁by ▁the ▁Chile an ▁government ▁that ▁started ▁the ▁process ▁of ▁creating ▁a ▁ 7 4 0 , 0 0 0 ▁square ▁kilomet re