Congenital platelet function defects
Congenital platelet function defects are problems with one of the blood elements needed for normal clots to form. These cells are called platelets. Congenital means present from birth.
Platelet storage pool disorder; Glanzmann's thrombasthenia; Bernard-Soulier syndrome; Platelet function defects - congenital
Congenital platelet function defects are bleeding disorders that cause reduced platelet function, even though there are normal platelet counts.
Most of the time, people with these disorders have a family history of a bleeding disorder. Bernard-Soulier syndrome occurs when platelets lack a substance that sticks to the walls of blood vessels. This disorder may cause severe bleeding.
- Glanzmann's thrombasthenia is a condition caused by the lack of a protein needed for platelets to clump together. This disorder may also cause severe bleeding.
- Platelet storage pool disorder (also called platelet secretion disorder) is due to a defect that cause easy bleeding or bruising. It is caused by the faulty storage of substances inside platelets. These substances are usually released to help platelets function properly.
- Bleeding during and after surgery
- Bleeding gums
- Easy bruising
- Heavy menstrual periods
- Prolonged bleeding with small injuries
Exams and Tests
The following tests may be used to diagnose this condition:
- Bleeding time
- Complete blood count (CBC)
- Partial thromboplastin time (PTT)
- Platelet aggregation test
- Prothrombin time (PT)
You may need other tests. Your relatives may need to be tested.
There is no specific treatment for these disorders.
People with bleeding disorders should avoid taking aspirin and nonsteroidal anti-inflammatory drugs (such as ibuprofen and naproxen) because they are known to affect blood clotting. Patients who have severe bleeding may need platelet transfusions.
Most of the time, treatment can control the bleeding. However, congenital platelet function defects are life-long conditions. There is no cure. People with this problem should take steps to avoid bleeding.
- Severe bleeding
- Iron deficiency anemia in menstruating women
When to Contact a Medical Professional
Call your health care provider if:
- You have bleeding or bruising and do not know the cause.
- Bleeding does not respond to the usual method of control.
A blood test can detect the gene responsible for the platelet defect. You may wish to seek genetic counseling if you have a family history of this problem and are considering having children.
Macartney CA, Paredes N, Chan AKC. Disorders of Coagulation in the Neonate. In: Hoffman R, Benz EJ Jr, Silberstein LE, Heslop HE, Weitz JI, eds. Hematology: Basic Principles and Practice. 6th ed. Philadelphia, PA: Saunders Elsevier; 2012:chap 152.
Nichols WL.Von Willebrand Disease and Hemorrhagic Abnormalities of Platelet and Vascular Function. In: Goldman L, Schafer AI, eds. Goldman's Cecil Medicine. 24th ed. Philadelphia, PA: Saunders Elsevier; 2011:chap 176.
Reviewed By: Yi-Bin Chen, MD, Leukemia/Bone Marrow Transplant Program, Massachusetts General Hospital. Also reviewed by A.D.A.M. Health Solutions, Ebix, Inc., Editorial Team: David Zieve, MD, MHA, Bethanne Black, Stephanie Slon, and Nissi Wang.