mrcem2-0800

A 45-year-old patient presents with frequent bruising and recurrent nosebleeds. She informs you that she has a rare platelet disorder and provides you with her outpatient letter from the hematology department, which includes details about the condition. According to the letter, her disorder is attributed to decreased levels of glycoprotein IIb/IIIa.
What is the MOST LIKELY diagnosis for this patient?