ROLE OF IMMATURE PLATELET FRACTION AS A PREDICTIVE MARKER IN THROMBOCYTOPENIA OF DIVERSE ETIOLOGIES
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Keywords
Thrombocytopenia, Immature Platelet Fraction (IPF), Reticulated Platelets, Diagnostic, Hypo-productive Thrombocytopenia, Hyper-destructive Thrombocytopenia
Abstract
Thrombocytopenia presents a common diagnostic challenge with diverse etiologies, broadly categorized as hypo-productive (impaired bone marrow production) or hyper-destructive (increased peripheral consumption/destruction). Timely differentiation is crucial for management but often relies on invasive bone marrow examination. The immature platelet fraction (IPF), a measure of newly released, RNA-rich platelets, has emerged as a potential non-invasive surrogate marker of real-time thrombopoietic activity.
Aims & Objectives: This study aimed to evaluate the diagnostic utility of IPF as a predictive marker in thrombocytopenia of diverse etiologies. The primary objectives were to compare IPF levels between hypo-productive and hyper-destructive groups, assess its correlation with platelet count, determine its diagnostic performance in etiological differentiation, and explore its clinical applicability.
Methodology: This is observational cross-sectional study was conducted in Department of Pathology and Laboratory Medicine, Sheikh Zayed Hospital and Medical College, Lahore, over six months. A total of 113 patients with confirmed thrombocytopenia (platelet count <150×10⁹/L) were enrolled and categorized into hypo-productive (n=45) and hyper-destructive (n=68) groups based on clinical and laboratory evaluation. IPF and complete blood count parameters were measured using a Sysmex XN-1000 hematology analyzer. Statistical analysis included independent sample t-tests, Pearson correlation, and receiver operating characteristic (ROC) curve analysis.
Results & Findings: A highly significant difference in mean IPF was observed between the hyper-destructive (11.8% ± 3.4) and hypo-productive (4.2% ± 1.9) groups (p < 0.001). A strong inverse correlation existed between platelet count and IPF (r = -0.62, p < 0.001). ROC curve analysis identified an IPF cutoff of >7.0% for distinguishing hyper-destructive from hypo-productive thrombocytopenia with a sensitivity of 85.3%, specificity of 82.2%, and an area under the curve (AUC) of 0.88, indicating excellent diagnostic accuracy.
Conclusion: The immature platelet fraction is a highly effective, rapid, and non-invasive biomarker for differentiating the underlying mechanism of thrombocytopenia. Its excellent discriminatory power supports its integration into routine diagnostic algorithms to guide clinical decision-making, potentially reducing the need for invasive bone marrow procedures in initial evaluation. Standardization and prospective outcome studies are recommended for broader clinical adoption.
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Saima Iram
Consultant Hematologist & Head of Hematology Department, Bolan Medical College Quetta, Pakistan
Nabila Akram
Assistant Professor Pathology, Avicenna Medical College, Lahore, Pakistan.
Hussain Farooq
Assistant Professor Hematology, Shaikh Zayed Post Graduate Medical Institute, Lahore, Pakistan
Uzma Chohan
Department of Pathology, Shahida Islam Medical College Lodhran, Pakistan.
Ujala Aymun
Consultant Hematologist, Ghurki Trust Teaching Hospital, Lahore, Pakistan.
Rabia Ameer
Department of Pathology, Fatima Memorial Hospital, Lahore, Pakistan.
