Inherited Platelet Function Disorders: Algorithms for Phenotypic and Genetic Investigation.

Area of Science:

• Hematology
• Clinical Pathology
• Molecular Diagnostics

Background:

• Inherited platelet function disorders (IPFDs) present with mucocutaneous bleeding and are challenging to diagnose due to their diverse nature and complex platelet activation pathways.
• Current diagnostic methods lack standardization, complicating accurate identification of IPFDs.

Purpose of the Study:

• To outline a rational, stepwise diagnostic algorithm for inherited platelet function disorders.
• To emphasize the importance of integrating clinical assessment with laboratory evaluations for IPFD diagnosis.

Main Methods:

• A tiered laboratory testing strategy, progressing from simple to complex assays.
• Utilizing tests such as platelet count, peripheral blood smear analysis, light transmission aggregometry, platelet granule analysis, and glycoprotein expression via flow cytometry.
• Incorporating advanced techniques like next-generation sequencing for genetic analysis.

Main Results:

• A significant proportion of IPFDs can be initially diagnosed at non-specialized centers using basic laboratory tests.
• A structured panel of tests enables effective phenotypic characterization of most IPFDs.
• Complex genetic testing, while advancing, still relies on initial clinical and phenotypic data.

Conclusions:

• A systematic diagnostic algorithm combining clinical data and a stepwise laboratory approach is essential for diagnosing IPFDs.
• While genetic testing is evolving, phenotypic characterization remains crucial for current IPFD diagnosis.
• Standardized assays and a rational approach improve the diagnostic yield for patients with suspected IPFDs.