Cellaboration | Small reviews. Shared discovery.

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Spot the uncertain cells.

Review one highlighted nucleus in a real, de-identified breast-tissue image. Your answer helps build an open map of images people find clear, ambiguous, or technically questionable—information future researchers can study.

1. Describe its shapeRound/full, thin/stretched, irregular, or unclear.

2. Compare its sizeSmaller, similar, or larger than nearby nuclei.

3. Be honest about doubtUnclear answers are useful—never force a guess.

This is not diagnosis and no laboratory is currently using these answers. Reference answers stay hidden during play. Disagreement identifies images worth studying; it does not prove a reference is wrong.

Friday entry is being tested safelyComplete 10 reviews and pay $1 / 1 test USDC to enter. No real money or prize is active.

Review statusCalibrating

Needs practiceImprovingQualified

Complete calibration decisions to measure reliability

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FRIDAY PICK · TEST MODE

Review 10 cells + pay $1 to enter

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GUIDED CELL 1

Describe the highlighted nucleus

Wider context · fixed image scale

Closer detail · same target

Use both views—the cell does not change size by categoryFirst judge shape. Then compare it only with nearby nuclei in the wider view.The ruler uses source-image pixels; it is not a physical measurement.

Important: round cells can be large, and irregular cells can be small. Shape and size are separate observations; overlapping or blurry cells can be marked unclear.

1 What shape do you see?

2 Compared with nearby nuclei?

Choose a shape first.

Choose shape and size. The app will combine them consistently.

Confidence & image-quality flags optional

Anything questionable? Choose up to 3

How confident?

Your observation is never treated as medical truth. Only aggregate results from at least three calibrated observers enter the public ambiguity map.

Spot the uncertain cells.

Review 10 cells + pay $1 to enter

Describe the highlighted nucleus

Your 10 reviews are complete