▁Pu ▁et ▁al . ▁found ▁a ▁frequency ▁of ▁ 2 3 % ▁in ▁brain ▁sc ans ▁( with ▁a ▁mean ▁diameter ▁of ▁ 4 . 3   mm ). ▁ ▁Despite ▁the ▁p ine al ▁g land ▁being ▁in ▁the ▁center ▁of ▁the ▁brain , ▁due ▁to ▁recent ▁adv anc ements ▁in ▁end os cop ic ▁medicine , ▁end os cop ic ▁brain ▁surg ery ▁to ▁d rain ▁and / or ▁remove ▁the ▁c yst ▁can ▁be ▁done ▁with ▁the ▁patient ▁sp ending ▁ 5 - 1 0 ▁night s ▁in ▁the ▁hospital , ▁and ▁being ▁fully ▁recovered ▁in ▁weeks , ▁rather ▁than ▁a ▁year , ▁as ▁is ▁the ▁case ▁with ▁open - sk ull ▁brain ▁surg ery . ▁ ▁The ▁National ▁Organ ization ▁for ▁R are ▁Dis orders ▁states ▁that ▁p ine al ▁c yst s ▁larger ▁than ▁ 5 . 0   mm ▁are ▁" rare ▁find ings " ▁and ▁are ▁possibly ▁sympt om atic . ▁ ▁If ▁narrow ing ▁of ▁the ▁c ere br al ▁aqu ed uct ▁occurs , ▁many ▁ne uro log ical ▁sympt oms ▁may ▁exist , ▁including ▁head aches , ▁vert igo , ▁n ause a , ▁mus cle ▁fasc ic ulations , ▁eye ▁sens itivity , ▁and ▁at ax ia . ▁Cont in ued ▁monitoring ▁of ▁the ▁c yst ▁might ▁be ▁recommended ▁to ▁monitor ▁its ▁growth , ▁and ▁surg ery ▁may ▁be ▁necessary . ▁ ▁Add itional ▁images ▁ ▁References ▁ ▁Further ▁reading ▁ ▁External ▁links ▁ ▁P ine al ▁C yst ▁Im ages ▁and