[Toxic effects on the kidney by endovesical instillations of formol. Hematogenic diffusion or reflux (author's...

Intravesical formalin instillation has its drawbacks and complications, the most serious one being the anuria either by oedematous obstruction or by tubular necrosis. Hematogenous absorption of formaldehyde was suspected but never proven. A case of tubular necrosis by hematogenous absorption is circumstantially proven following intravesical treatment in a 70 years old patient with recurrency of vesical tumour and profuse bleeding.