▁and ▁is ▁the ▁most ▁common ▁tum or ▁present ing ▁in ▁new born ▁humans . ▁ ▁Most ▁S CT s ▁are ▁found ▁in ▁b ab ies ▁and ▁children , ▁but ▁S CT s ▁have ▁been ▁reported ▁in ▁adult s ▁and ▁the ▁increasing ly ▁routine ▁use ▁of ▁pr en atal ▁ul tras ound ▁ex ams ▁has ▁dram atically ▁increased ▁the ▁number ▁of ▁diagn osed ▁S CT s ▁present ing ▁in ▁fet uses . ▁ ▁Like ▁other ▁ter atom as , ▁an ▁S CT ▁can ▁grow ▁very ▁large . ▁ ▁Un like ▁other ▁ter atom as , ▁an ▁S CT ▁sometimes ▁grows ▁larger ▁than ▁the ▁rest ▁of ▁the ▁fet us . ▁ ▁Sac roc oc cy ge al ▁ter atom as ▁are ▁the ▁most ▁common ▁type ▁of ▁germ ▁cell ▁tum ors ▁( both ▁ben ign ▁and ▁m align ant ) ▁diagn osed ▁in ▁ne on ates , ▁inf ants , ▁and ▁children ▁younger ▁than ▁ 4 ▁years . ▁ ▁S CT s ▁occur ▁more ▁often ▁in ▁girls ▁than ▁in ▁boys ; ▁r ati os ▁of ▁ 3 : 1 ▁to ▁ 4 : 1 ▁have ▁been ▁reported . ▁ ▁Histor ically , ▁sac roc oc cy ge al ▁ter atom as ▁present ▁in ▁ 2 ▁clin ical ▁patterns ▁related ▁to ▁the ▁child ’ s ▁age , ▁tum or ▁location , ▁and ▁lik elihood ▁of ▁tum or ▁m align ancy . ▁ ▁With ▁the ▁advent ▁of ▁routine ▁pr en atal ▁ul tras ound ▁exam in ations , ▁a ▁third ▁clin ical ▁pattern ▁is ▁emer ging . ▁▁