▁of ▁prior ▁ul cer ation ▁may ▁leave ▁behind ▁permanent ▁sc arring . ▁ ▁Add itional ▁long - term ▁sequ ela e ▁stem ▁from ▁the ▁identification ▁of ▁ext rac ut aneous ▁manifest ations ▁in ▁association ▁with ▁the ▁I H . ▁ ▁For ▁example , ▁a ▁patient ▁with ▁a ▁large ▁fa cial ▁hem ang i oma ▁who ▁is ▁found ▁to ▁meet ▁criteria ▁for ▁P H ACE ▁synd rome ▁will ▁require ▁potentially ▁on going ▁ne uro logic , ▁card iac , ▁and / or ▁o ph th alm olog ic ▁monitoring . ▁ ▁In ▁cases ▁of ▁I H s ▁that ▁comprom ise ▁of ▁vital ▁structures , ▁sympt oms ▁may ▁improve ▁with ▁in volution ▁of ▁the ▁hem ang i oma . ▁For ▁example , ▁resp ir atory ▁dist ress ▁would ▁improve ▁with ▁in volution ▁of ▁a ▁space - occup ying ▁I H ▁involving ▁the ▁air way ▁and ▁high - output ▁heart ▁failure ▁may ▁less en ▁with ▁in volution ▁of ▁a ▁he p atic ▁hem ang i oma ▁and ▁ultimately ▁treatment ▁may ▁be ▁t aper ed ▁or ▁dis cont in ued . ▁In ▁other ▁cases , ▁such ▁as ▁an ▁un tre ated ▁e y el id ▁hem ang i oma , ▁result ant ▁amb ly op ia ▁does ▁not ▁improve ▁with ▁in volution ▁of ▁the ▁cut aneous ▁les ion . ▁ ▁For ▁these ▁reasons , ▁inf ants ▁with ▁infant ile ▁hem ang iom as ▁should ▁be ▁evaluated ▁by ▁an ▁appropriate ▁clin ician ▁during ▁the ▁early ▁pro l ifer ative ▁phase ▁so ▁that ▁risk ▁monitoring ▁and ▁treatment ▁be ▁individual