**Core Concept**
The Van Nuys grading system is a classification tool used in the assessment and management of atypical ductal hyperplasia (ADH), a type of breast lesion. This system helps pathologists to standardize their reporting and guide clinical decision-making. The Van Nuys grading system takes into account several factors, including the size and number of lesions, the presence of calcifications, and the histological features of the lesions.

**Why the Correct Answer is Right**
The Van Nuys grading system is specifically designed for the management of atypical ductal hyperplasia (ADH), which is a significant risk factor for the development of breast cancer. The system helps to stratify patients into different risk categories, allowing for more tailored management and follow-up. By considering the size and number of lesions, the presence of calcifications, and the histological features, the Van Nuys grading system provides a more comprehensive assessment of the patient's risk.

**Why Each Wrong Option is Incorrect**
**Option A:** The Van Nuys grading system is not used for the assessment of ductal carcinoma in situ (DCIS), which is another type of breast lesion. While DCIS is also a risk factor for breast cancer, the Van Nuys grading system is specifically designed for ADH.
**Option B:** The Van Nuys grading system does not take into account the patient's age or family history, which are also important factors in the management of breast lesions.
**Option C:** The Van Nuys grading system is not used for the assessment of invasive breast cancer, which requires a different approach to management and follow-up.

**Clinical Pearl / High-Yield Fact**
The Van Nuys grading system is an important tool for pathologists and clinicians to standardize the reporting and management of atypical ductal hyperplasia (ADH). By using this system, clinicians can provide more tailored care and follow-up for patients with ADH, reducing the risk of breast cancer.

**Correct Answer: B.**