An endoluminal prosthesis system for a branched body lumen comprises a branch vessel prosthesis (11). The branch vessel prosthesis (11) is deployable within a branch vessel body lumen and comprises a stent (48) having a generally tubular body portion (33), a flareable proximal end portion (36), and a coupling portion (38) disposed intermediate the body portion and the flareable portion. The coupling portion is preferably more crush-resistant than the body portion.
