The proportion of large platelets, a marker of platelet production.
Platelet large cell ratio, or P-LCR, is the proportion of your platelets that are larger than a set size threshold, usually 12 femtolitres. It is reported as a percentage by haematology analysers.
Larger platelets tend to be younger and more active, so P-LCR gives an idea of how many big, freshly produced platelets are circulating.
A higher proportion of large platelets can mean the bone marrow is releasing new platelets quickly, which happens when platelets are being used up or destroyed. It tends to move together with mean platelet volume.
P-LCR is not a standalone diagnostic test, but together with the other platelet indices it can support the picture of platelet turnover and activation.
Aniva reads your result against research-backed ranges, not just the lab's wide normal. The reference shown below is specific to this biomarker.
Typical adult guidance, analyser dependent:
| Result | Range |
|---|---|
| Platelet large cell ratio (P-LCR) | 15 to 35 % |
This index has no single agreed range and differs between analyser models. Read your result against your laboratory's interval.
Platelet clumping, delay before analysis, and EDTA-related size changes can distort the value. It is not comparable between analyser brands and is not used alone to make decisions.
Read alongside mean platelet volume, platelet count, and platelet distribution width.
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