Bladder stones occasionally develop because of foreign bodies in the bladder. These are usually
concretions or small stones formed around foreign bodies which act as nidus. Giant vesical
calculus weighing more than 100 g is a rare entity. 1 We present a case of 25 year old female with
a giant vesical calculus formed around a hair pin. To the best of our knowledge only one case of
giant vesical calculus developing around a foreign body has been described in literature.2 We
report this second case of giant vesical calculus formed around a hair pin.