**Core Concept**
Meningiomas are typically slow-growing, benign tumors arising from the meninges, which are the protective membranes surrounding the brain and spinal cord. They are the most common type of primary brain tumor in adults.

**Why the Correct Answer is Right**
Meningiomas are often characterized by their dural attachment and tendency to cause symptoms due to mass effect, such as seizures, headaches, or cranial nerve palsies. They can also exhibit calcification, whorl-like patterns, and dural tail sign on imaging studies. The correct answer is a characteristic that is not typically associated with meningiomas.

**Why Each Wrong Option is Incorrect**
**Option A:** Calcification is actually a common feature of meningiomas, often visible on CT scans.
**Option B:** Dural attachment is a hallmark feature of meningiomas, as they arise from the meninges.
**Option C:** Meningiomas can exhibit a range of imaging features, including dural tail sign, but this is not the correct answer as it is not a distinguishing characteristic.

**Clinical Pearl / High-Yield Fact**
Meningiomas are often found incidentally on imaging studies, particularly in older adults, and may require surgical resection to alleviate symptoms.

**Correct Answer:** D.