A bifurcated endovascular stent is formed by a pair of tube-defining members, one of which is open at its ends and has a lateral opening between its ends. The other tubular structure is adapted to be advanced into one end of the first tube and exit through the lateral opening. The tube-defining members are formed in a modular construction, each including an elongate spine and a plurality of generally tube-defining modules attached to the spine in a longitudinally sequenced array. The modular construction enables a wide range of variation in the characteristics of the stent, including longitudinal flexibility, radial expansion characteristics among others.
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