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Stenoses can occur at the level of device extremities (A–D); the stenosis is more severe when the length introduced inside the tube is insufficient (compare A and B), and eccentric when the device is curved (D). The relationship between stenoses and length of device introduced inside tubes is shown for FD48 (E) as well as for the 48-wire stent-in-stent endoluminal flow-diverting devices (F).
