CORE LABORATORY
Don't have an account? Sign Up

Storage Pool Disorders (Gray Platelet Syndrome)

Overview

Storage pool disorders are a group of inherited disorders caused by abnormalities with platelet granules. Granules are small packets inside the platelets in which proteins and other chemicals important to their function are stored. The contents of the granules are released during the secretion phase of platelet activation, acting as chemical signals to recruit more platelets and other cells to the site of injury to stop the bleeding. There are two types of granules: alpha granules and dense granules. Some storage pool deficiencies are caused by a lack of granules or their contents, but the most common ones are caused by a failure of the platelets to release their contents into the bloodstream.1

 

Types
  1. Release defects are a diverse group of disorders caused by an abnormality in the secretion mechanism. Even though the granules are present within the platelets, their contents are not emptied into the bloodstream properly.1
  2. Delta storage pool deficiency is a platelet function disorder caused by a lack of dense granules and the chemicals normally stored inside them. Without these chemicals, platelets are not activated properly and the injured blood vessel does not constrict to help stop bleeding. This type of bleeding problem can be seen in other inherited conditions such as Hermansky-Pudlak and Chediak-Higashi syndromes.1 
  3. Grey platelet syndrome is a very rare platelet function disorder caused by a lack of alpha granules and the chemicals normally stored inside them. Without these chemicals, platelets cannot stick to the blood vessel wall, clump together, or repair the injured blood vessel the way they should.1
Symptoms

Symptoms of storage pool deficiencies vary from one individual to the next and are usually mild to moderate. People with storage pool deficiencies may experience:

 

  • Easy bruising
  • Nose bleeds (epistaxis)
  • Bleeding from gums
  • Heavy or prolonged menstrual bleeding (menorrhagia), bleeding during ovulation, or bleeding during or after childbirth
  • Abnormal bleeding during or after surgery, circumcision, or dental work1
Causes

It is a disorder that is inherited or passed down from a child’s parent(s).

1. World Federation of Hemophilia. What are inherited platelet funtion disorders? http://www1.wfh.org/publications/files/pdf-1336.pdf
Image source: American Society of Hematology. Gray-Platelet syndrome. https://imagebank.hematology.org/image/61243/grayplatelet-syndrome
©2021 Abbott, Abbott Park, Illinois, U.S.A.

Privacy Policy| Terms and Conditions

Unless otherwise specified, all product and service names appearing in this Internet site are trademarks owned by or licensed to Abbott, its subsidiaries or affiliates. No use of any Abbott trademark, trade name, or trade dress in this site may be made without the prior written authorization of Abbott, except to identify the product or services of the company.

All Alinity hq, CELL-DYN Ruby and CELL-DYN Sapphire instruments are Class I laser products. ACCELERATOR a3600 is a Class II laser product. 

The Alinity, ACCELERATOR and CELL-DYN systems are intended for performing in vitro diagnostic assays on samples of human origin (blood, urine). Read the instructions in the system manuals and labeling and/or reagent instructions carefully. Manufacturer or Authorized Representative: Abbott Germany.

Alinity h-series is available in select countries, not including the US.