Bernard-Soulier Syndrome

Bernard-Soulier Syndrome is a rare inherited bleeding disorder that affects how your blood clots. People with this condition have platelets that do not work properly. Platelets are tiny blood cells that help stop bleeding by forming clots.

The disorder happens because platelets are missing a specific protein complex called GPIb-IX-V. This protein normally helps platelets stick to blood vessel walls when you get a cut or injury. Without it, your platelets cannot do their job effectively. People with Bernard-Soulier Syndrome typically have fewer platelets than normal, and the platelets they do have are unusually large.

This condition is genetic and passed down through families. It affects roughly 1 in 1 million people worldwide. Most people are diagnosed in childhood, but some mild cases may not be detected until adulthood. The severity of bleeding symptoms varies widely from person to person.

• Easy bruising that appears with minor bumps or without obvious cause
• Frequent nosebleeds that last longer than normal or are difficult to stop
• Bleeding gums, especially when brushing teeth or eating
• Heavy or prolonged menstrual bleeding in women
• Extended bleeding after dental procedures or surgery
• Tiny red or purple spots on the skin called petechiae
• Blood in urine or stool
• Prolonged bleeding from small cuts or scrapes

Some people with mild forms of Bernard-Soulier Syndrome may have few symptoms until they experience trauma or surgery. The bleeding tendency is usually present from birth but may not be noticed until later in life.

Bernard-Soulier Syndrome is caused by genetic mutations that affect platelet proteins. The condition is inherited in an autosomal recessive pattern. This means a child must receive one faulty gene from each parent to develop the disorder. Parents who carry one copy of the mutation typically have no symptoms themselves.

The genetic mutations prevent platelets from making the GPIb-IX-V protein complex correctly. This complex acts like a hook that allows platelets to grab onto damaged blood vessel walls. Without functional GPIb-IX-V, platelets cannot stick properly and bleeding takes longer to stop. The condition affects platelet count and size, leading to thrombocytopenia with characteristically giant platelets. Because it is genetic, lifestyle factors do not cause or worsen Bernard-Soulier Syndrome.

Bernard-Soulier Syndrome is diagnosed through a combination of blood tests and family history. A complete blood count will show a low platelet count, typically between 50,000 and 100,000 platelets per microliter. Normal platelet counts range from 150,000 to 400,000. The blood smear will reveal unusually large platelets, often two to three times the normal size.

Additional specialized tests measure how well platelets function. Flow cytometry can detect the missing GPIb-IX-V protein complex on platelet surfaces. Genetic testing can confirm the specific mutation. Rite Aid offers platelet count testing through our preventive health panel at Quest Diagnostics locations nationwide. Regular monitoring helps track your platelet levels and guide treatment decisions. If initial testing suggests Bernard-Soulier Syndrome, your doctor will recommend specialized platelet function studies.

• Avoid medications that interfere with platelet function, including aspirin and ibuprofen
• Use alternative pain relievers like acetaminophen when needed
• Platelet transfusions before surgery or dental procedures to prevent excessive bleeding
• Antifibrinolytic medications like tranexamic acid to help blood clots stay stable
• Hormonal treatments for women with heavy menstrual bleeding
• Desmopressin in select cases, though effectiveness varies
• Wear medical alert identification to inform emergency responders of your condition
• Avoid contact sports and activities with high injury risk
• Maintain good dental hygiene to reduce gum bleeding
• Work closely with a hematologist who specializes in bleeding disorders