Stage IA1 (with lymphovascular space invasion) and stage IA2 For stage IA1 with LVSI or stage IA2, recommended treatments include Modified radical hysterectomy and pelvic lymphadenectomy (with or without SLN mapping) External pelvic radiation therapy with brachytherapy Criteria for radiation therapy after radical hysterectomy Criteria used to determine whether pelvic radiation with concurrent chemotherapy should be done after radical hysterectomy include the following (see table Sedlis Criteria for External Pelvic Radiation After Radical Hysterectomy): Presence of lymphovascular space invasion Depth of invasion Tumor size Patients with a combination of risk factors, such as large tumor size (> 4 cm), deep (> 1/3) stromal invasion, and / or lymphovascular space invasion (LVSI), have a risk of recurrence and death of up to 30% after surgery alone (2, 3).