Phase II Clinical Study of the Safety and Efficacy of the Relay Thoracic Stent-Graft

Inclusion Criteria:

- Subjects with diagnosed descending thoracic aneurysm or penetrating ulcer

- Subjects whose anatomy can accommodate the Relay device

- Subjects who consent to participate

- Subjects who agree to a follow-up schedule

Exclusion Criteria:

- Subjects with lesions other than thoracic aneurysm and penetrating ulcer

- Subjects with less than 1 year life expectancy

- Subjects who are pregnant

- Subjects with medical conditions that wold complicate the endovascular procedure or
confound results (e.g., Marfan's syndrome, morbid obesity, severe coronary artery
disease)

- Subjects participating in another investigational study