## **Core Concept**
Squamous cell carcinoma (SCC) is a type of skin cancer that originates from squamous epithelial cells. It is known for its distinct clinical and histopathological features. One of the characteristic features of SCC is its growth pattern and appearance.

## **Why the Correct Answer is Right**
The correct answer, **E. rolled**, describes the edges of squamous cell carcinoma. SCC is often characterized by its rolled or rounded edges, which are a result of the tumor's growth pattern. The tumor cells proliferate and form a rounded, sometimes indurated, border. This feature is a classic clinical descriptor used in dermatology to help diagnose SCC.

## **Why Each Wrong Option is Incorrect**
- **Option A: Regular** - While some skin lesions may have regular edges, SCC is specifically known for its irregular and rolled edges, not regular ones.
- **Option B: Irregular** - Although SCC can have irregular shapes, the term "irregular" does not specifically describe the characteristic rolled edges.
- **Option C: Smooth** - Smooth edges are not typically associated with SCC; the edges are more accurately described as rolled.
- **Option D: Ulcerated** - Ulceration can occur in SCC, especially in more advanced stages, but it does not describe the edges of the tumor.

## **Clinical Pearl / High-Yield Fact**
A key clinical feature to remember about squamous cell carcinoma is its tendency to have rolled edges, which can help in its clinical diagnosis. This characteristic, along with its potential for ulceration and variable growth rate, makes SCC a significant consideration in dermatological assessments.

## **Correct Answer:** . **rolled**