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Platelet parameters for distinguishing between inherited macrothrombocytopenia and acquired thrombocytopenia: a
Wenlan Chen1, Yajie Ding1, Li Cai1
1Institute of Hematology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
Abstract:
Inherited macrothrombocytopenia (IMT) is characterized by increased platelet volume. Using platelet parameters, including platelet count, mean platelet volume (MPV), platelet-large cell ratio (P-LCR), and platelet distribution width, to differentiate IMT from acquired thrombocytopenia (AT) in the Chinese population is unclear. This study aimed to evaluate these parameters and determine optimal thresholds for early IMT identification. This single-center, retrospective case-control study included IMT patients from 1 January 2022 to 31 January 2024. Age- and sex-matched AT patients and healthy individuals were selected (1:3 ratio). Platelet parameters were compared using a one-way analysis of variance and the Kruskal-Wallis test. The ability of platelet parameters to identify IMT was assessed using the receiver operating characteristic curve, with the optimal threshold determined using the Youden index. This study included 13 IMT patients, 39 AT patients, and 39 controls. The MPV and P-LCR were significantly higher in IMT than in AT patients (P < 0.05) and strongly differentiated between groups. The area under the curve (95% confidence interval) for MPV and P-LCR were 0.865 (0.724-1.000) and 0.860 (0.719-1.000), respectively. The optimal MPV and P-LCR thresholds for IMT were 14.55 fL and 58%, respectively. The MPV was most important for distinguishing IMT from patients with thrombocytopenia.
Insights
Mean platelet volume (MPV) and platelet-large cell ratio (P-LCR) effectively distinguish inherited macrothrombocytopenia (IMT) from acquired thrombocytopenia (AT) in Chinese patients. Optimal thresholds were identified for early IMT diagnosis.
Area of Science:
- Hematology
- Clinical Diagnostics
- Genetics
Background:
- Inherited macrothrombocytopenia (IMT) presents with enlarged platelets, but differentiating it from acquired thrombocytopenia (AT) using standard platelet parameters in the Chinese population requires further investigation.
- Platelet count, mean platelet volume (MPV), platelet-large cell ratio (P-LCR), and platelet distribution width are key parameters in hematological analysis.
Purpose of the Study:
- To evaluate the diagnostic utility of platelet parameters in differentiating IMT from AT in Chinese individuals.
- To establish optimal thresholds for MPV and P-LCR for early identification of IMT.
Main Methods:
- A single-center, retrospective case-control study involving IMT patients, age- and sex-matched AT patients, and healthy controls.
- Comparison of platelet parameters using one-way ANOVA and Kruskal-Wallis tests.
- Receiver operating characteristic (ROC) curve analysis to determine the diagnostic accuracy and optimal thresholds (Youden index) for MPV and P-LCR.
Main Results:
- MPV and P-LCR were significantly higher in IMT patients compared to AT patients (P < 0.05).
- ROC curve analysis demonstrated strong differentiation capabilities for MPV (AUC: 0.865) and P-LCR (AUC: 0.860).
- Optimal thresholds for IMT identification were determined as MPV of 14.55 fL and P-LCR of 58%.
Conclusions:
- MPV and P-LCR are valuable parameters for distinguishing IMT from AT in the Chinese population.
- The identified thresholds can aid in the early and accurate diagnosis of IMT.
- MPV emerged as the most critical parameter for differentiating IMT from other thrombocytopenic conditions.
