A 58-year-old diabetic woman was admitted to emergency department with unstable angina. After initial medication with acetylsalicylic acid, clopidogrel, enoxaparin, atorvastatin, ramipril, and pantoprazole, she underwent coronary angiography which revealed 90% stenosis at circumflex coronary artery and obtuse marginal branch of circumflex coronary artery (CX-OM) bifurcation (Medina 1-1-1) (Figure 1). A 7 F Extra BackUp guiding catheter was used to engage the left main coronary artery. Both the main branch and the side branch were wired. The obtuse marginal branch (OM) was dilated with a 2.0 x 20-mm balloon dilatation catheter (Simpass; Simeks, Istanbul, Turkey) at 16 atm, and the circumflex coronary artery (Cx) body was dilated with a 2.5 x 20-mm balloon dilatation catheter (Simpass; Simeks) at 18 atm. Thereafter, while parking a balloon in the main branch, a 2.5 x 18-mm stent (Endeavor Resolute; Medtronic) was deployed in the side branch at 12 atm and postdilated with a 2.5 x 12-mm noncompliant (NC) balloon (Simpass; Simeks) at 20 atm. Subsequently deploying the main branch balloon, a mini crush was performed and another 2.5 x 30-mm stent (Endeavor Resolute; Medtronic) was implanted at 20 atm into the Cx body. The OM was rewired and final kissing was performed with NC balloons. Thereafter, localized haziness suggesting thrombosis at first sight appeared in the main-branch stent, both in the proximal part and distal to the OM take off (Figure 2). The patient had no symptom and was hemodynamically stable. StentBoost showed stent fracture and disruption (Figure 3). Another Endeavor Resolute stent was implanted at 14 atm to cover the fracture sites. The final result was satisfactory (Figure 4).