<prompt> Lariche syndrome is due to?Bilateral iliac aery occlusion with sterilityBilateral iliac aery occlusion with impotencyUnilateral iliac aery occlusion with sterilityUnilateral iliac aery occlusion with impotency  <response>: . Due to block in the common iliac aery or aooiliac segment or bilateral iliac aery may cause pain in the buttocks often associated with impotence is called Leriches syndrome.pain commonly develops when the muscles are exercising.cause of pain is accumulation of substance p and metabolites. Refer page no 170 of SRBs manual of surgery 5 th edition. 