Large Unstained Cells (LUC)

Large Unstained Cells (LUC) are a subset of white blood cells that are larger than normal lymphocytes and do not stain with standard dyes. They may include atypical lymphocytes, blasts, or other abno…

Category: Complete Blood Count

Also known as: luc

Reference range: 0–4 % (Source: ABIM)

Standard unit: %

High values may indicate

Elevated LUC may indicate viral infections, atypical lymphocytes, or rarely hematologic malignancies.

Low values may indicate

Normal or zero LUC values are typical and do not indicate any concern.

Source: BloodId admin-reviewed

Track your Large Unstained Cells (LUC) over time with BloodId