A modular prosthetic conduit system such as a stent or stent graft system tailoredfor the repair of aneurysms or other compromised vessel walls. The stent or stentgraft system incorporates various means to interlock the multiple modular componentsused in the repair procedure. The present invention further provides a modularstent graft system tailored for the repair of aneurysms or other compromisedvessel walls that cross or are adjacent to a branch or bifurcation in a vessel.
