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Section 2 of 6 · Open sections

Required section · Section 2 of 6

Build a mechanism map

Begin with distribution and preparation, then name a form. Compare the optimal monolayer with adjacent systematic fields; a shape confined to a thick area, feathered edge, or a poorly stained region is not a released morphology comment. If distortion is diffuse or preparation is uncertain, repeat the smear or seek review before reporting the morphology.

This limited comparison groups only supported visible forms. A spherocyte is round and dense with reduced central pallor. A target cell has a hemoglobinized center, a pale intervening zone, and a peripheral hemoglobinized rim. Elliptocytes are elongated. Report a supported teardrop descriptively; do not place it in a categorical mechanism bin.

Fragmentation requires positive fragment criteria. Oxidative injury can produce blister and bite forms; Heinz bodies require a separate supravital stain. Describe the observed form rather than releasing a mechanism.

Illustrative drawing — this picture was drawn rather than captured.

Map: membrane or surface-area-to-volume forms include spherocytes and target cells; cytoskeletal forms include elliptocytes; fragmentation includes schistocytes; oxidative injury includes bite and blister cells.
Figure 1Mechanism map; it is not a recognition image.

Evidence-first morphology workflow

  1. Review distribution and preparation

    Inspect monolayer and adjacent fields for edge concentration, drying, stain, age, or thickness artifact.

  2. Identify supported morphology

    Name only forms with defining visible features in systematic fields.

  3. Resolve disagreement

    If analyzer flag and microscopy disagree, repeat preparation or rerun/review by the local method; investigate oxidative context when bite or blister forms are supported.

  4. Report or escalate

    Release supported morphology, or hold for recollection, consultation, or unresolved-artifact suppression under procedure.

Knowledge checks

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Knowledge check 1

Which observations fit the membrane or surface-area-to-volume bin? Select all that apply.

Choose at least 2 options.

Section status

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The module finishes after every required section is marked done and every check in those sections is correct.