RBC Anomalies

Question 1

Identify
Abnormal variation in RBC volume or diameter

Answer 1

Anisocytosis

Question 2

Large RBC (>8 um in diameter), MCV >100 fL

Answer 2

Macrocyte

Question 3

Large oval RBC

Answer 3

Oval macrocyte

Question 4

Small RBC (<6 um in diameter), MCV <80 fL

Answer 4

Microcyte

Question 5

Abnormal variation in RBC shape

Answer 5

Poikilocytosis

Question 6

Small round dense RBC w no central pallor

Answer 6

Spherocyte

Question 7

Cigar-shaped RBC

Answer 7

Elliptocyte

Question 8

Egg-shaped RBC

Answer 8

Ovalocyte

Question 9

RBC with slit-like area of central pallor

Answer 9

Stomatocyte

Question 10

Thin dense elongated RBC pointed at each end; may be curved

Answer 10

Sickle cell

Question 11

Hexagonal crystal of dense hgb formed within the RBC membrane

Answer 11

Hgb C crystal

Question 12

Fingerlike or quartz-like crystal of dense hgb protruding from the RBC membrane

Answer 12

Hgb SC crystal

Question 13

RBC w hgb concentrated in the center and around the periphery resembling a target

Answer 13

Target cell (codocyte)

Question 14

Fragmented RBC due to rupture in the peripheral circulation

Answer 14

Schistocyte

Question 15

RBC fragment in shape of helmet

Answer 15

Helmet cell (keratocyte)

Question 16

RBC with membrane folded over

Answer 16

Folded cell

Question 17

Small dense RBC with few irregularly spaced projections of varying length

Answer 17

Acanthocyte (spurr cell)

Question 18

RBC w blunt or pointed short projections that are usually evenly spaced over the surface of cell; present in all fields of blood film but in variable numbers per field

Answer 18

Burr cell (echinocyte)

Question 19

RBC w a single pointed extension resembling a teardrop or pear

Answer 19

Teardrop cell (dacryocyte)