Lung Nodule Growth Rate Calculator

Written by Great Medico

Updated September 24, 2026 •2 min read

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Respiratory numbers often become useful only after the right relationship is calculated. Lung Nodule Growth Rate Calculator focuses on the pulmonary measurements shown in this tool and turns them into the specific ratio, score, or estimate its engine supports.

What this calculator does

Lung Nodule Growth Rate Calculator estimates lung-nodule malignancy probability with the Brock/PanCan model used by this calculator. It only uses the fields shown in this calculator; it does not silently add tests, diagnoses, symptoms, or clinical variables that are absent from the interface. lung-nodule page uses the Brock/PanCan malignancy model rather than serial-diameter growth arithmetic.

How to use it

Enter or select Age, Sex, Emphysema, Family history of lung cancer, Spiculation, and the remaining displayed fields. Use measurements from the same respiratory assessment and confirm whether oxygen values are percentages, fractions, or pressures. If an input is unknown, it is better to leave the calculation unresolved than to invent a value.

How the calculation works

Despite its name, this build uses the Brock/PanCan malignancy model rather than serial diameter doubling-time arithmetic. It combines age, sex, emphysema, family history, spiculation, upper-lobe location, nodule count, nodule size, and nodule type in the implemented logistic model to estimate malignancy probability.

Example

Using the calculator’s prefilled demonstration values, the primary output is 3.09 %, labeled “Brock/PanCan nodule malignancy probability”; Log odds is -3.4469 and Nodule size is 8 mm. That sample is useful for checking the calculation path, but real interpretation should use verified measurements from the same clinical or study context.

How to interpret the result

The percentage is the Brock/PanCan malignancy probability generated by the entered nodule and patient factors. It is not a percentage growth rate and should not be compared with serial size change as if it were.

Limitations and notes

The name can be misleading: this build estimates Brock/PanCan malignancy probability, not growth rate or volume-doubling time. Brock performance depends on the population and imaging context, and management also considers CT appearance, prior imaging, nodule size, patient risk, and guideline-specific pathways.