A stent system is provided for percutaneous insertion in an artery of a main stent which may include at least one peripheral fenestration defined through the stent wall. The peripheral fenestration may be configured to be expanded in situ to receive a peripheral stent. The stent system also may include a peripheral stent configured to be inserted into the peripheral fenestration of the main stent. The peripheral stent may extend, when inserted in the peripheral fenestration, generally perpendicular to the longitudinal axis of the main stent. The stent system may further include a guidewire, insertable through the peripheral aperture, for maneuvering the main stent into place in the artery. The guidewire may be tapered toward its distal end. The stent system may also include a dilation device for dilating the peripheral stent within the peripheral aperture.
