I have one in the L temporal lobe as well with multiple bleeds.  It's my understanding it can bleed again.  If the cavernoma has been there all our life....then the bleeds are few and far between effectively.  And each bleed isn't causing major problems like a stroke does.  Is surgery not an option?  Mine is apparently operable, so that's the route we are exploring.  Am trying to get info about the recovery, etc.  Good luck.