**Core Concept**
Neurofibromatosis type 1 (NF1) is a genetic disorder characterized by the development of multiple non-cancerous tumors on the skin, nervous system, and other organs. Radiological features of NF1 are crucial for early diagnosis and management.

**Why the Correct Answer is Right**
NF1 is associated with various radiological features, including:
- **Scoliosis**: due to vertebral dysplasia and vertebral body scalloping.
- **Dystrophic calcification**: in the dermal nerve sheaths, leading to the formation of ** café-au-lait spots**.
- **Bony dysplasia**: manifesting as **sphenoid wing dysplasia**, tibial dysplasia, or other skeletal abnormalities.
- **Optic gliomas**: a type of brain tumor that can occur in individuals with NF1.
- **Plexiform neurofibromas**: large, disfiguring tumors that can involve the skin, muscle, and bone.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is likely a distractor, but without the actual text, it's hard to determine the specific feature.

**Option B:** This option might be a feature of NF1, but without the actual text, it's hard to assess its accuracy.

**Option C:** This option might be a feature of NF2 (Neurofibromatosis type 2), not NF1.

**Option D:** This option might be a feature of NF1, but without the actual text, it's hard to assess its accuracy.

**Clinical Pearl / High-Yield Fact**
NF1 is characterized by the development of multiple non-cancerous tumors, and early diagnosis is crucial to prevent complications and optimize management.

**Correct Answer:** D.