Platelet Large Cell Ratio
The platelet large cell ratio, or P-LCR, is the proportion of your platelets that are larger than a set size threshold. Larger platelets are often younger and more recently released from the bone marrow.
Because bigger platelets tend to be newer, this ratio offers a hint about how actively your marrow is producing platelets and about the size mix in your circulation. It is closely related to other platelet indices like mean platelet volume. It is rarely interpreted alone and is best read alongside your platelet count.
A higher P-LCR means a greater share of larger platelets, which can occur when the marrow is producing platelets briskly or in various conditions affecting platelet size. On its own it is non-specific and usually interpreted with the platelet count and other indices. Your clinician will consider it within your full blood picture.
A lower P-LCR indicates a smaller proportion of large platelets and is often not a concern by itself.
This index is analyzer-specific and best interpreted together with your platelet count, so use your report's range and discuss it with your clinician.
Sources
Educational context only, not medical advice or a diagnosis. Reference ranges vary by lab, age and sex; always discuss your results with a clinician.