TABLE 8.

Structured reporting of findings on lung cancer screening CT (Reprinted from J Am Coll Radiol, McKee, B.J., et al., Initial Experience With a Free, High-Volume, Low-Dose CT Lung Cancer Screening Program, epub ahead of print, 2013, with permission from Elsevier).[62].

CATEGORY	FINDINGS	RECOMMENDATION
LungRADS1: Negative	Solid nodules < 4 mm Ground glass nodules < 5 mm Characteristically benign findings: atelectasis, scarring, calcified granuloma, etc	Next LDCT in 12 months
LungRADS2:Benign	Solid nodules > 4 mm but stable for > 2 years Biopsy proven benign histology (eg, necrotizing granuloma)	Next LDCT in 12 months
LungRADS 3: Positive, likely benign (< 4% chance of malignancy)	Solid nodules 4–8 mm or ground glass nodules > 5 mm	Next LDCT in 3 – 6 months
	Stable nodules without documented 2 years of stability	Next LDCT in 6 – 12 months
	Probable infection/inflammation	next LDCT in 1- 2 months, consider antibiotics
LungRADS 4: Positive, suspicious for malignancy (> 4% chance of malignancy)	Growing solid or ground glass nodule Solid nodule greater than 8 mm Other findings suspicious for malignancy (adenopathy/effusion)	Pulmonary consultation advised
LungRADS 5: Known cancer
Significant incidental findings "Category S": Positive(P) or Negative(N)	Indeterminate breast, liver, kidney, adrenal lesions, aneurysms, etc