Table 4. Indications for postoperative pelvic radiotherapy for cervical cancer patients with middle-risk factors.

LVSI	Stromal invasion	Tumor size (cm) (Determined by clinical palpation)
LVSI, lymph-vascular space invasion.
+	Deep 1/3	any
+	Middle 1/3	≥2
+	Superficial 1/3	≥5
−	Middle or deep 1/3	≥4