<unk>  is an abnormality of the platelets. It is an extremely rare coagulopathy (bleeding disorder due to a blood abnormality), in which the platelets contain defective or low levels of glycoprotein IIb/IIIa (GpIIb/IIIa), which is a receptor for fibrinogen. As a result, no fibrinogen bridging of platelets to other platelets can occur, and the bleeding time is significantly prolonged.
Glanzmann's thrombasthenia
Harris platelet syndrome
Quebec platelet disorder
Gray platelet syndrome
Sticky platelet syndrome
Bernard–Soulier syndrome
Von Willebrand disease
Acquired haemophilia