Microsoft PowerPoint - 17 Introduction Valentini [Compatibil

Lymph Node Size:

Upper limits of normal

• Short axis

• Lower para-aortic

11 mm

• Common iliac

9 mm

• Internal iliac

7 mm

• Obturator

8 mm

Carrington B, Imaging in Oncology, 2

Ed, p1007

Jager et al, AJR, 1996;167:1503-1507

• External iliac

10 mm

• ‘Size Ratio’

• <8 mm benign (minimal SA)

• >10 mm malignant

• 8 – 10mm – malignant if round (SA/LA > 0.8)