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Section 2 of 6 · Open sections

Required section · Section 2 of 6

Describe the cell before naming it

Chromatin texture, nucleoli, nuclear contour, cytoplasmic amount, granulation, and inclusions are separate observations. Fine or open chromatin and visible nucleoli support an immature appearance, but neither alone establishes blast lineage or leukemia. Record the population in which the feature occurs and its approximate proportion.

A high nuclear-to-cytoplasmic ratio means the nucleus occupies much of the cell. Asynchronous maturation means nuclear and cytoplasmic development do not appear coordinated. Both are useful descriptions that need CBC, smear, and review correlation.

A mature granulocyte usually has clumped chromatin and a segmented nuclear contour. An immature cell may have fine chromatin, nucleoli, and scant cytoplasm. These contrasts support a descriptive report, not a final classification. Use feature words first, then state the bounded interpretation.

Illustrative drawing — this picture was drawn rather than captured.

Matrix listing chromatin and nucleoli, nuclear contour, and cytoplasm/proportion descriptions for mature granulocytes and immature-appearing cells, with a reminder to record population and proportion and correlate CBC and flags.
Figure 1Morphology-description matrix contrasting observable mature and immature feature words. It is not a cell image or image-recognition aid.

A repeatable description sequence for a suspicious leukocyte

  1. Scan the field

    Assess smear quality and whether the feature recurs in a coherent cell population.

  2. Describe structure

    Record chromatin, nucleoli, contour, cytoplasm, granulation, inclusions, and approximate proportion.

  3. Correlate evidence

    Compare the description with CBC values, analyzer flags, and relevant specimen limitations.

  4. Route the finding

    Use the controlled local review and escalation procedure without assigning an image-only disease diagnosis.

Knowledge checks

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Knowledge check 1

Select the observations that belong in an objective description of an immature cell population.

Choose at least 3 options.

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