**Core Concept**
A hypertrophic scar is a type of raised, fibrotic tissue that occurs at the site of a wound, typically in response to trauma or injury. The formation of hypertrophic scars is characterized by an excessive deposition of collagen, leading to the thickening of the dermal layer and the formation of a raised, red, and often itchy lesion.

**Why the Correct Answer is Right**
Hypertrophic scars result from an imbalance between the synthesis and degradation of collagen, leading to an accumulation of type I collagen in the dermal layer. The process is mediated by various growth factors, including platelet-derived growth factor (PDGF) and transforming growth factor-beta (TGF-β), which stimulate the proliferation and migration of fibroblasts. The resulting scar tissue is composed of a dense network of collagen fibers, which can lead to the formation of a raised, thickened lesion.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because keloid scars are a different type of raised scar that can occur in response to trauma or injury.
**Option B:** This option is incorrect because atrophic scars are a type of depressed scar that can occur in response to trauma or injury, such as acne or chickenpox.
**Option C:** This option is incorrect because contractures are a type of scar that can occur in response to burns or other injuries, leading to the tightening of the skin.

**Clinical Pearl / High-Yield Fact**
It's essential to differentiate between hypertrophic scars and keloid scars, as the treatment approach may differ. Hypertrophic scars can be treated with topical silicone gel or creams, while keloid scars may require more aggressive treatment, such as intralesional corticosteroid injections or surgical excision.

**Correct Answer: C.