▁the ▁base ▁of ▁the ▁spl en ic ▁caps ule . ▁As ▁the ▁inf ar ction ▁m atures , ▁the ▁affected ▁t issue ▁may ▁normal ize , ▁li que f y ▁or ▁become ▁contract ed ▁or ▁scar red . ▁Ab dom inal ▁ul tras ound ▁has ▁also ▁been ▁used ▁to ▁detect ▁spl en ic ▁inf ar ction . ▁Ul tras ound ▁find ings ▁of ▁the ▁hy po echo ic ▁w edge - sh aped ▁region ▁of ▁spl en ic ▁t issue ▁indicate ▁inf ar ction . ▁E volution ▁of ▁inf ar ction ▁may ▁appear ▁as ▁hyp ere cho ic ▁with ▁retra ction ▁of ▁the ▁spl en ic ▁caps ule . ▁ ▁S pl en ic ▁abs cess ▁ ▁F ever ▁is ▁the ▁most ▁common ▁sympt om ▁of ▁spl en ic ▁abs cess , ▁followed ▁by ▁ab dom inal ▁pain ▁and ▁a ▁tender ▁mass ▁on ▁pal p ation ▁of ▁the ▁left ▁upper ▁quadr ant ▁of ▁the ▁ab d omen . ▁The ▁common ▁signs ▁and ▁sympt oms ▁described ▁of ▁a ▁spl en ic ▁abs cess ▁include ▁the ▁tri ad ▁of ▁fe ver , ▁left ▁upper ▁quadr ant ▁tend ern ess , ▁and ▁le uk oc yt osis ▁is ▁present ▁only ▁in ▁one - third ▁of ▁the ▁cases . ▁ ▁S pl en ic ▁ru pt ure ▁ ▁Tra uma ▁is ▁the ▁most ▁common ▁mechanism ▁of ▁spl en ic ▁ru pt ure , ▁and ▁bl unt ▁tra uma ▁involving ▁the ▁left - upper ▁quadr ant , ▁left ▁rib ▁c age , ▁or ▁left ▁fl ank ▁should ▁raise