| A | B |
|---|
| Polychromasia | bluish-gray color |
| Target cells (codocytes) | Bull's-eye, "Mexican hat cell" |
| Stomatocytes | RBC with slit like central pallor |
| Spherocytes | Small, dark-staining RBCs without central pallor |
| Rouleaux | RBCs resemble stack of coins |
| Agglutination | RBCs in irregular clumps |
| Anisocytosis | Variation in size |
| Macrocytes | RBCs > 9 um (MCV > 100 fL) |
| Microcytes | RBCs < 6 um (MCV < 80 fL) |
| Poikilocytosis | Variation in shape |
| Elliptocytes/Ovalocytes | Oval or pencil shaped |
| Creanated RBCs | Round cell with knobby, uniform projections |
| Burr cells (echinocytes) | Round cell with spiny, unevenly spaced projections. Variable # in different fields |
| Acanthocytes | Shrunken cells with irregular, spiny projections |
| Schistocytes | RBC fragments, helmets, triangular cells |
| Blister cells | RBCs with one or more "bubbles" (vacuoles) |
| Sickle cells (drepanocytes) | Cresent, boat or oat-shaped |
| Hemoglobin SC crystals | Glovelike intracellular crystals |
| Teardrops (dacryocytes) | Tear-drop-shaped cells |
| Hypochromia | Central pallor greater than one-third cell diameter |
| Anisochromia | Mixture of normochromic and hypochromic RBCs |
