Anti-migration micropatterned stent coating

An endoprosthesis having an expanded state and an unexpanded state, the endoprosthesis comprising:

• a stent having a first end, a second end, and a longitudinal axis extending therebetween, the stent further having an inner surface extending from the first end to the second end and defining a lumen, an outer surface extending from the first end to the second end, and a thickness defined between the inner surface and the outer surface;
• and
• a stent end covering disposed at the first end of the stent, the stent end covering including a first portion circumferentially surrounding the stent at the first end of the stent a second portion extending longitudinally beyond the first end of the stent, the stent end covering comprising:
• a base having an inner surface facing radially inwardly, an outer surface opposite the inner surface, and plurality of protrusions extending radially outward from the outer surface, the protrusions arranged in a micropattern;
• wherein the second portion of the base has an inner diameter less than an inner diameter of the stent at the first end.