Page 211 - Clinical Hematology_ Theory _ Procedures ( PDFDrive )

CHAPTER 9 ■ Leukocytes: Lymphocytes and Plasma Cells 195

TABLE 9.3 Comparative Characteristics of Lymphocytes

Lymphoblast Lymphocyte Prolymphocyte Mature

Size 15–20 mm 15–18 µm Small, 6–9 µm Large, 17–20 µm

N:C ratio 4:1 4:1 to 3:1 Small, 4:1 to 3:1 Large, 2:1

Nucleus

Nuclear shape Round or oval Oval, slightly indented Round or oval; may have clefts

Nucleoli 1 or 2 0 or 1 Absent

Chromatin Delicate Slightly condensed Dense and clumped

Cytoplasm

Granules None May have a few azurophilic granules Few azurophilic granules may

be present

Amount Small Small Very scanty

Color Medium blue, may have a Medium blue with a thin rim of darker blue Light blue

darker blue border

FIGURE 9.6 L m . (R m m FIGURE 9.8 M m . (R m
A SC. Anderson’s Atlas o Hematology, P , PA: m A SC. Anderson’s Atlas o Hematology, P ,

W K H /L W m & W k , .) PA: W K H /L W m & W k , .)

Lymphocyte

Polychromatophilic
normoblast

FIGURE 9.9 L m m , m .
FIGURE 9.7 P m . (R m m (R m m A SC. Anderson’s Atlas o

A SC. Anderson’s Atlas o Hematology, P , PA: Hematology, P , PA: W K H /L

W K H /L W m & W k , .) W m & W k , .)