Solitary Pulmonary Nodule

Malignancy Risk Calculator

Estimates the probability that a pulmonary nodule is malignant, based on the validated Mayo Clinic logistic regression model (Swensen et al., 1997). Enter patient and nodule characteristics below.

Patient

Age
years
Smoking Status
Extrathoracic Cancer > 5 Years Ago

Nodule

Diameter
mm
Upper Lobe Location
Spiculated Margin
Malignancy Risk
—
5%65%

Low

< 5%

Intermediate

5 – 65%

High

> 65%

Swensen SJ, Silverstein MD, Ilstrup DM, Schleck CD, Edell ES. The probability of malignancy in solitary pulmonary nodules. Arch Intern Med. 1997;157(8):849–855. Validated: Radiology. 2004;231:606–614.

Risk tier thresholds per ACCP guidelines — Gould MK et al. Chest. 2013;143(5 Suppl):e93S–e120S.

Educational use only · Not a medical device

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