Normal Limits for Thoracic Lymph Nodes

	Right	Left
Upper paratracheal	7 mm	7 mm
Lower paratracheal	10 mm	10 mm
Hilar	10 mm	7 mm
AP window	9 mm
Subcarinal	7 mm

All numbers are short-axis dimensions.

References

Glazer GM, Gross BH, Quint LE, Francis IR, Bookstein FL, Orringer MB. Normal mediastinal lymph nodes: number and size according to American Thoracic Society mapping. AJR Am J Roentgenol. 1985 Feb;144(2):261-5.