**Core Concept**
Spalding's sign refers to the appearance of a "rugger jersey" or striped pattern on the skull, typically due to a condition where the periosteum is lifted away from the bone, exposing the underlying cortical bone. This occurs in conditions with increased intracranial pressure, leading to erosion of the inner table of the skull.

**Why the Correct Answer is Right**
The appearance of Spalding's sign is a result of the lifting of the periosteum, which is a membrane covering the bone. This lifting occurs due to increased intracranial pressure, causing the bone to erode, particularly the inner table. The resulting appearance resembles a "rugger jersey" or striped pattern on the skull. This phenomenon is often associated with conditions such as intracranial tumors, abscesses, or other mass lesions.

**Why Each Wrong Option is Incorrect**
**Option A:** Not related to Spalding's sign, which is a radiological feature of increased intracranial pressure.
**Option B:** Not a characteristic feature of this condition; it's more commonly associated with osteoporosis or other bone disorders.
**Option C:** Incorrect, as it's not a feature of this condition; it's more commonly associated with other diseases.

**Clinical Pearl / High-Yield Fact**
Spalding's sign is a classic radiological feature of increased intracranial pressure, often seen in conditions such as intracranial tumors or abscesses. It's essential to recognize this sign to differentiate it from other bone disorders.

**Correct Answer:** C.