**Question:** All of the following are indications for postoperative radiotherapy in a case of Carcinoma Endometrium except not related - surgery.

A. Post-operative vaginal brachytherapy
B. Radical hysterectomy
C. Pelvic lymphadenectomy
D. Radical hysterectomy with bilateral salpingo-oophorectomy

**Core Concept:** Carcinoma Endometrium is a type of cancer that develops from the cells of the endometrium (inner lining of the uterus). Radiotherapy plays a significant role in the management of endometrial cancer, particularly when surgery is performed. Postoperative radiotherapy is given to reduce the risk of cancer recurrence and improve overall survival.

**Why the Correct Answer is Right:** The correct answer is **D**. Radical hysterectomy with bilateral salpingo-oophorectomy is a surgical procedure that includes removing the uterus, both fallopian tubes, and both ovaries. This procedure is a part of the surgery, not an indication for radiotherapy. Radiotherapy is typically recommended after simpler procedures like **B** (Radical hysterectomy) or **C** (Pelvic lymphadenectomy), which may leave some cancer cells behind and increase the risk of recurrence.

**Why Each Wrong Option is Incorrect:**

**A** (Post-operative vaginal brachytherapy) is related to radiotherapy and could be considered as an alternative to external beam radiotherapy in specific cases. However, it is not the same as the correct answer **D**.

**B** (Radical hysterectomy) is a surgical procedure that involves removing the uterus, cervix, and part of the vagina. While this procedure is essential for treating endometrial cancer, it does not eliminate the need for postoperative radiotherapy.

**C** (Pelvic lymphadenectomy) involves the removal of pelvic lymph nodes to assess for cancer spread. Similar to option **B**, it is a part of the surgical procedure and not a reason for radiotherapy.

**Clinical Pearl:** Postoperative radiotherapy is crucial after specific types of surgeries, such as **B** and **C**, to reduce the risk of cancer recurrence. However, the correct answer **D** refers to a surgical procedure that does not justify the use of postoperative radiotherapy, which is necessary after simpler surgeries like **A**, **B**, or **C** to eliminate cancer cells and reduce the risk of recurrence.