Indication of adjuvant radiotherapy in Ca endometrium is/are:a) Cervical involvementb) Lymph node involvement c) Carcinoma in situd) Papillary serous tumore) Estrogen receptor positive
**Core Concept**
Adjuvant radiotherapy in endometrial cancer refers to the use of radiation therapy after primary treatment to reduce the risk of cancer recurrence. The decision to use adjuvant radiotherapy depends on various factors, including the stage of the disease, histological subtype, and presence of high-risk features.
**Why the Correct Answer is Right**
Adjuvant radiotherapy is indicated in endometrial cancer to prevent locoregional recurrence, particularly in cases with high-risk features such as cervical involvement (b), lymph node involvement (b), and papillary serous tumors (d). Papillary serous tumors are a subtype of endometrial cancer known for their aggressive behavior and high risk of recurrence. Adjuvant radiotherapy helps to eliminate microscopic disease in the pelvis and reduce the risk of recurrence.
**Why Each Wrong Option is Incorrect**
* **Option A:** Cervical involvement is actually an indication for adjuvant radiotherapy, not an incorrect option.
* **Option C:** Carcinoma in situ (CIS) is an early stage of cancer that is typically treated with hysterectomy and does not require adjuvant radiotherapy.
* **Option E:** Estrogen receptor positivity is a favorable prognostic factor in endometrial cancer and does not require adjuvant radiotherapy.
**Clinical Pearl / High-Yield Fact**
Papillary serous tumors are a high-risk subtype of endometrial cancer that requires aggressive management, including adjuvant radiotherapy, to prevent recurrence.
**Correct Answer:** . B. Lymph node involvement.