Example of an AP radiation therapy treatment field for Stage IB2+ Cervix used at Tufts/Brown residency program. Actual patient contours should guide field design.

• Superior border: L4/L5. If common illiac LN involvement, superior border should extend to L3/L4 or higher to cover the disease with 3 cm margin
• Inferior border: inferior edge of pubic ramus. If vaginal involvement, inferior border should extend 3-4 cm past the vaginal extent of the disease, as marked by a gold seed
• Lateral borders: ~2cm lateral to bony pelvis, in order to cover lymph nodes
• Red: cervix; Blue: uterus; Khaki: bladder; Brown: rectum
• Orange: common illiac LNs; Yellow: external illiac LNs; Light Green: obturator LNs; Purple: internal illiac LNs; Dark Green: presacral LNs
• Please see lateral field