The above normal node sizes are based on recommendations from the Royal College of Radiologists 1, with the following additions:
- jugulodigastric lymph nodes may be up to 15 mm in short axis in younger patients 2
- mesenteric lymph nodes: <5 mm 3
- mediastinal lymph nodes: American College of Radiology accepts <15mm for incidental mediastinal lymph nodes 4
The above normal sizes are guidelines only and must be interpreted in the context of clinical suspicion and pre-test probability.