P-LCR
P-LCR (Platelet Large Cell Ratio) measures the percentage of large platelets in the blood. Large platelets are often younger and more active.
Category: Complete Blood Count
Also known as: p-lcr, plcr, plc-r, platelet large cell ratio, large platelet ratio
Reference range: 15–35 % (Source: ABIM)
Standard unit: %
High values may indicate
High P-LCR may indicate active platelet production, often seen in immune thrombocytopenic purpura (ITP), hyperthyroidism, or after blood loss.
Low values may indicate
Low P-LCR indicates a lower proportion of large platelets and is generally not clinically significant.
Frequently asked questions
- What is a normal P-LCR level?
- A typical reference range for P-LCR is 15–35 % (source: ABIM). Reference ranges vary by laboratory, age, and sex, so always compare against the range on your own lab report.
- What units is P-LCR measured in?
- P-LCR is most commonly reported in %. Labs in different countries may use other units — you can convert between them with BloodId's blood test unit converter.
- Where do P-LCR reference ranges come from?
- BloodId uses ABIM standard reference ranges and educational information from MedlinePlus (see our methodology). Reference ranges still vary by lab, age, and sex, so always compare against your own report.
- Can I track P-LCR over time?
- Yes. Upload results from any lab and BloodId charts your P-LCR over time against its reference range, so you can see whether the trend is rising, falling, or stable.