▁very ▁inf re quent . ▁ ▁Most ▁of ▁these ▁path ological ▁types ▁of ▁di vert icul um ▁are ▁capable ▁of ▁har bor ing ▁an ▁enter ol ith . ▁If ▁the ▁enter ol ith ▁stays ▁in ▁place , ▁it ▁may ▁cause ▁no ▁problems , ▁but ▁a ▁large ▁enter ol ith ▁exp elled ▁from ▁a ▁di vert icul um ▁into ▁the ▁l umen ▁can ▁cause ▁obst ruction . ▁ ▁Gen ito - ur inary ▁tract ▁di vert ic ula ▁▁ ▁Cal y ce al ▁di vert icul um : ▁usually ▁asympt om atic , ▁but ▁if ▁a ▁stone ▁becomes ▁lod ged ▁in ▁the ▁out p ouch ing ▁they ▁may ▁present ▁with ▁pain . ▁Bl ad der ▁di vert icul um : ▁Bal lo on - like ▁growth s ▁on ▁the ▁bl ad der ▁commonly ▁associated ▁with ▁a ▁chron ic ▁out flow ▁obst ruction , ▁such ▁as ▁ben ign ▁pro static ▁hyper pl asia ▁in ▁older ▁males . ▁Usually ▁found ▁in ▁pairs ▁on ▁opposite ▁sides ▁of ▁the ▁bl ad der , ▁bl ad der ▁di vert ic ula ▁are ▁often ▁surg ically ▁removed ▁to ▁prevent ▁in fection , ▁ru pt ure , ▁or ▁even ▁cancer . ▁U re th ral ▁di vert icul um : ▁Ac quired ▁di vert ic ula ▁are ▁usually ▁post - in fect ious ▁in ▁females , ▁whereas ▁they ▁are ▁more ▁likely ▁to ▁be ▁con gen ital ▁in ▁males . ▁ ▁Other ▁di vert ic ula ▁▁ ▁Card iac ▁di vert icul um : ▁A ▁very ▁rare ▁con gen ital ▁mal formation