C-RADS™

ACR's CT Colonography Imaging Reporting & Data System, for describing colorectal and extra-colonic findings

C-RADS

Colonic findings

Is any of the following true about this study?

C0 = Inadequate Study

No Recommendation

C0 = Awaiting prior comparisons

No Recommendation
Which abnormalities have you identified? (select all that apply)

C1 = Normal Colon or Benign Lesion

Recommendation: Continue routine screening every 5-10 years

C2 = Intermediate Polyp or Indeterminate Finding

Recommendation: Surveillance or colonoscopy. Evidence suggests surveillance can be delayed at least 3 years, subject to individual patient circumstance.

C3 = Polyp, Possibly Advanced Adenoma

Recommendation: Surveillance or colonoscopy every 5-10 years

C4 = Colonic Mass, Likely Malignant

Recommendation: Surgical consultation. Subject to local practice, endoscopic biopsy may be indicated.

Extra-colonic findings

The scoring of extracolonic findings per C-RADS is very straightforward. Please refer to the following table:

E0 = Limited examCompromised by artifact; evaluation of extracolonic soft tissues is severely limited.No recommendations.
E1 = Normal exam or anatomic variantNo extracolonic abnormalities visible.
Anatomic Variant: eg, retroaortic left renal vein		No recommendations.
E2 = Clinically unimportant findingExamples:
a. Liver, Kidney: simple cysts
b. Gallbladder: cholelithiasis without cholecystitis
c. Vertebra: hemangioma		No work-up indicated.
E3 = Likely unimportant finding or incompletely characterizedExamples:
a. Kidney: minimally complex or homogeneously hyperattenuating cyst		Subject to local practice and patient preference,
work-up may be indicated.
E4 = Potentially important finding

Examples:

a. Kidney: solid renal mass
b. Lymphadenopathy
c. Vasculature: aortic aneurysm
d. Lung: non-uniformly calcified parenchymal nodule ≥1 cm

Communicate to referring physician as per accepted practice guidelines.

 

Start Over

Click here to visit C-RADS page on ACR.

Reference:
  1. Zalis ME, Barish MA, Choi JR, et al. CT colonography reporting and data system: a consensus proposal. Radiology. 2005;236(1):3-9. doi:10.1148/radiol.2361041926
  2. Pooler BD, Kim DH, Lam VP, Burnside ES, Pickhardt PJ. CT Colonography Reporting and Data System (C-RADS): benchmark values from a clinical screening program. AJR Am J Roentgenol. 2014;202(6):1232-1237. doi:10.2214/AJR.13.11272

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