Course Overview

Platelet Morphology: Practical Interpretation, Laboratory Pitfalls, and Clinical Correlation

1 CPD - (DHA/MTS/ACC/26-2197/A) | 100% Online | Complete any time 
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Module Description

This module discusses the practical aspects of platelet morphological features and its role in routine hematology practice. It explains how variations in platelet size, granularity, and number can provide valuable diagnostic clues. The session focuses on common laboratory challenges (including platelet clumping, giant platelets, gray platelets, and microplatelets) and explains how these findings can lead to inaccurate automated platelet counts if not recognized during blood film reviews. The discussion also highlights the importance of correlating platelet morphological features with other blood film findings to identify inherited platelet disorders, reactive conditions, hematologic malignancies, thrombotic microangiopathies, and infectious diseases, such as malaria. Throughout the discussion, emphasis is placed on the role of laboratory professionals in verifying automated analyzer results, performing manual platelet estimation when required, and ensuring clinically meaningful reporting to support accurate diagnosis and patient management. 

Learning Objectives

  • Describe the normal morphological features of platelets by identifying their typical size, staining characteristics, granularity, and expected distribution on a peripheral blood film. 
  • Differentiate common platelet morphological abnormalities, including platelet clumping, large and giant platelets, gray platelets, and microplatelets, and explain how these findings influence automated platelet counts and laboratory reporting. 
  • Evaluate unexpected thrombocytopenia by recognizing laboratory artifacts, such as ethylenediaminetetraacetic acid (EDTA)-induced platelet clumping, platelet satellitism, and analyzer-related counting errors, and determine when manual platelet estimation is required. 
  • Interpret platelet morphological characteristics together with red blood cell and white blood cell abnormalities to identify features suggestive of inherited platelet disorders, thrombotic microangiopathies, hematologic malignancies, and selected infectious diseases
  • Apply a systematic approach to peripheral blood film review by integrating platelet morphological  characteristics with automated analyzer results and relevant clinical information to support accurate laboratory interpretation and appropriate communication of findings. 

Course Lessons