**Core Concept**
Atypical endometrial hyperplasia is a precancerous condition characterized by the uncontrolled growth of endometrial cells, which can progress to endometrial carcinoma if left untreated. In postmenopausal women, the risk of malignancy is higher, necessitating a definitive treatment approach.

**Why the Correct Answer is Right**
Hysterectomy is the treatment of choice for atypical endometrial hyperplasia in postmenopausal women due to the high risk of underlying endometrial cancer. This surgical approach eliminates the risk of malignancy and provides a definitive diagnosis. The primary concern in postmenopausal women is the potential for endometrial cancer, which cannot be ruled out with medical management alone. Progestogens and estrogens may be used in premenopausal women to manage endometrial hyperplasia, but they are not suitable for postmenopausal women due to the increased risk of cancer.

**Why Each Wrong Option is Incorrect**
**Option A:** Estrogens are contraindicated in the treatment of atypical endometrial hyperplasia as they can stimulate further cell growth and increase the risk of malignancy.
**Option C:** Progestogens may be used in premenopausal women to manage endometrial hyperplasia, but they are not effective in postmenopausal women due to the high risk of underlying cancer.
**Option D:** Radiotherapy is not a primary treatment for atypical endometrial hyperplasia, as it is typically reserved for cases of endometrial cancer or other advanced malignancies.

**Clinical Pearl / High-Yield Fact**
In postmenopausal women with atypical endometrial hyperplasia, it is essential to consider the possibility of underlying endometrial cancer and proceed with a definitive treatment approach, such as hysterectomy, to eliminate the risk of malignancy.

✓ Correct Answer: B. Hysterectomy