Decide: Report, Refine, or Refer?

A BAL differential asks the reader to do three things in order: identify what is actually on the slide, decide whether the specimen is good enough to interpret, and choose a defensible next action. The next action is bounded. At the bench, the only choices are to release a descriptive differential result, to note a limitation on the report (contamination, low cellularity, degeneration), or to hold the slide for cytopathology or microbiology review because of a specific finding that requires it.

Escalation is triggered by specific findings, not by an unusual percentage. Malignant-appearing cells, organisms seen on the stained slide (bacterial, fungal, mycobacterial, or viral inclusion changes), and grossly cloudy or flocculent fluid suggestive of pulmonary alveolar proteinosis all require dedicated pathology or microbiology review rather than a bench-level final call. A shifted differential pattern, by contrast, including a clearly lymphocytic or neutrophilic result, is within the bench technologist's scope to report as a descriptive finding.

A body fluid report also has a structural requirement: when the counting method cannot reliably separate white blood cells from other nucleated cells, the report must carry a total nucleated cell (TNC) count together with a relative differential listing every nucleated cell type actually observed on the stained slide, not only the ones that fit a preset category list. This keeps unusual or unexpected cell types visible on the report instead of being absorbed into an "other" bucket.

Work through the case findings once more and decide what belongs on the released report, what belongs in a comment about specimen limitations, and what would have changed the decision to escalate.

Report what was actually seen, flag what limits confidence, and reserve escalation for the specific findings that require it, not for an unexpected percentage.