All are features of scleroderma except?
**Core Concept**
Scleroderma, also known as systemic sclerosis, is a chronic autoimmune disease characterized by thickening of the skin and involvement of various internal organs, including the lungs, heart, and gastrointestinal tract. The pathophysiology of scleroderma involves activation of fibroblasts, leading to excessive production of collagen and other extracellular matrix proteins.
**Why the Correct Answer is Right**
The correct answer is the feature that is not characteristic of scleroderma. Scleroderma is known for its skin thickening, vascular alterations, and internal organ involvement. The key features of scleroderma include:
* Skin thickening and tightening (scleroderma)
* Vascular alterations, including Raynaud's phenomenon and digital ulcers
* Internal organ involvement, such as pulmonary fibrosis, heart disease, and gastrointestinal disease
* Autoantibody production, including anti-Scl-70 and anti-centromere antibodies
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because scleroderma is actually associated with skin thickening and tightening, not thinning.
**Option B:** This option is incorrect because vascular alterations, including Raynaud's phenomenon, are a hallmark of scleroderma.
**Option C:** This option is incorrect because internal organ involvement, such as pulmonary fibrosis, is a common feature of scleroderma.
**Option D:** This option is incorrect because autoantibody production, including anti-Scl-70 and anti-centromere antibodies, is a characteristic of scleroderma.
**Clinical Pearl / High-Yield Fact**
Scleroderma is a heterogeneous disease, and patients may present with a wide range of symptoms. A high index of suspicion is necessary for early diagnosis and treatment. The presence of skin thickening, vascular alterations, and internal organ involvement should raise the suspicion of scleroderma.
**Correct Answer:** A. Scleroderma is not typically characterized by skin thinning.