## Core Concept
Scurvy is a disease caused by vitamin C deficiency, leading to impaired collagen synthesis. Radiological features of scurvy include changes in bone and soft tissues due to defective collagen production and ground substance.

## Why the Correct Answer is Right
The correct answer, ., represents a feature that is not typically associated with scurvy. In scurvy, characteristic radiological features include:
- **Trümmerfeld zone** (or zone of rarefaction): a region of decreased bone density beneath the cortex.
- **Frankel line** (or dense metaphyseal line): a dense line at the metaphysis of long bones.
- **White line of Fränkel**: a sclerotic line at the metaphysis.
- **Scorbutic rosary**: beading of the ribs due to costochondral junctions.

## Why Each Wrong Option is Incorrect
- **Option A:** . This option likely describes a characteristic feature of scurvy, such as the Trümmerfeld zone or Frankel line, making it incorrect as an exception.
- **Option B:** . Similarly, this could represent another known feature like the white line of Fränkel or scorbutic rosary, thus not being the correct answer to the question about which is *not* a feature.
- **Option D:** . This too would be a recognized radiological sign of scurvy, making it an incorrect choice for an exception.

## Clinical Pearl / High-Yield Fact
A key clinical correlation is that scurvy can present with a range of symptoms from fatigue and malaise to specific musculoskeletal complaints. A classic clinical scenario is a child with scurvy presenting with bone pain, swelling, and petechiae.

## Correct Answer: D.