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Section 5 of 6 · Open sections

Required section · Section 5 of 6

Classify the next review and choose the action

Case A is a fresh smear with neutrophilia, bands and metamyelocytes, coarse granules in many neutrophils, occasional Döhle bodies, and no blasts. This is compatible with a reactive morphology pattern when the laboratory’s criteria are met. The action is not to diagnose sepsis, but to release the locally standardized comment after the required review.

Case B was held for many hours before smear preparation and shows diffuse vacuolation with degranulation. The same appearances cannot confidently establish in vivo activation because storage can cause both changes. The defensible action is to qualify the limitation and seek a fresh specimen if local policy requires it.

Case C has large dark granules in multiple leukocyte lineages, while Case D has Döhle-like inclusions with large platelets and variable thrombocytopenia. These distributions point toward inherited look-alikes rather than a simple reactive pattern and require the designated review route. Select the bounded laboratory action from the evidence and local criteria, not from the clinical story alone.

Look-alike classification cards.
CaseVisible evidenceMost defensible classificationAction
AFresh film; toxic granules, Döhle bodies, left shift; no blastsReactive pattern possibleApply local grading and comment policy
BDelayed EDTA film; diffuse vacuolation and degranulationStorage artifact cannot be excludedQualify limitation; fresh smear per local policy
CLarge dark granules in multiple leukocyte lineagesAlder-Reilly-like morphologyUse designated review route
DDöhle-like inclusions with large plateletsMay-Hegglin-related morphologyUse designated review route

Knowledge checks

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Knowledge check 1

Case B has a delayed EDTA film with diffuse vacuolation and degranulation. What is the preferred interpretation?

Choose one option.

Knowledge check 2

Which cases need the designated review route rather than a simple reactive label? Select all that apply.

Choose at least 2 options.

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