## Core Concept
Adjuvant radiotherapy in Carcinoma Endometrium is considered in specific situations to improve local control and reduce recurrence rates. The decision to use adjuvant radiotherapy depends on various factors including tumor characteristics, stage, and patient preferences. It is often used to address high-risk features.

## Why the Correct Answer is Right
Adjuvant radiotherapy is typically considered for patients with high-risk features such as high-grade tumors, deep myometrial invasion, or certain histological subtypes. It is also considered for tumors with a high risk of local recurrence. The correct answer, which is not an indication, needs to be identified based on the standard management principles of endometrial cancer.

## Why Each Wrong Option is Incorrect
- **Option A:** High-grade tumors and deep myometrial invasion are well-established indications for adjuvant radiotherapy in carcinoma endometrium. These features increase the risk of local recurrence, making adjuvant treatment beneficial.
- **Option B:** Certain histological subtypes, such as serous or clear cell carcinomas, are considered high-risk and may benefit from adjuvant radiotherapy due to their aggressive nature and higher risk of recurrence.
- **Option D:** Positive lymph nodes or a high risk of lymph node involvement can also be an indication for adjuvant radiotherapy, as it helps in controlling microscopic disease that might not be addressed by surgery alone.

## Clinical Pearl / High-Yield Fact
A key point to remember is that the decision for adjuvant radiotherapy in endometrial cancer is multifactorial and often involves a discussion of the risks and benefits with the patient. Factors such as age, comorbidities, and patient preference play a significant role in the final decision-making process.

## Correct Answer Line
**Correct Answer: D.**