**Core Concept**
Turricephaly, also known as turricephalic cranium, is a rare congenital anomaly involving abnormal skull shape and size. It is characterized by an unusually short and broad skull with a prominent forehead, a flat occuput, and an elevated posterior fontanelle.

**Why the Correct Answer is Right**
The pathogenesis of turricephaly is not well understood, but it is believed to be related to abnormal intracranial pressure and skull growth. Infants with turricephaly may exhibit symptoms such as macrocephaly, delayed motor development, and visual impairment. The elevated posterior fontanelle is a hallmark of this condition, which can lead to increased intracranial pressure and potentially life-threatening complications.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is not relevant to the definition of turricephaly.
**Option B:** While macrocephaly may be present in some cases, it is not a defining characteristic of turricephaly.
**Option C:** This option is incorrect as it is not a known feature of turricephaly.

**Clinical Pearl / High-Yield Fact**
Turricephaly is often associated with other congenital anomalies, such as spina bifida and hydrocephalus, which can lead to increased intracranial pressure and neurological complications. Early diagnosis and management are crucial to prevent long-term sequelae.

**Correct Answer:** D. Abnormal skull shape and size with an elevated posterior fontanelle.