The unbreakable bladder stone--Munchhausen's tale.

A wide range of intra-vesical foreign bodies have been described in the literature. Causes include iatrogenic, migration from adjacent organs, penetrating injuries and self-insertion, either due to eroticism, inquisitiveness or as a result of a psychiatric illness. We present an unusual case of fictitious bladder stones that proved unbreakable using all standard endourological techniques.