**Core Concept**
Cephalhematoma is a **subperiosteal hemorrhage** that occurs in newborns, typically as a result of birth trauma. It is characterized by a collection of blood between the skull and the periosteum, which is a fibrous membrane covering the bone.

**Why the Correct Answer is Right**
Since the correct answer is not specified, let's discuss the general characteristics of cephalhematoma. Cephalhematoma is usually confined to a single bone, does not cross suture lines, and may be associated with **fractures** or **subperiosteal** bleeding. The correct answer should be a characteristic that does not apply to cephalhematoma.

**Why Each Wrong Option is Incorrect**
**Option A:**
**Option B:**
**Option C:**
**Option D:**

**Clinical Pearl / High-Yield Fact**
A key point to remember is that cephalhematoma does not cross **suture lines**, which distinguishes it from other types of hemorrhages.

**Correct Answer:** D. Crosses suture lines.