True regarding amyloidosis are, A/E ?
**Amyloidosis Core Concept**
Amyloidosis is a group of disorders characterized by the deposition of amyloid fibrils in various tissues, leading to organ dysfunction. These fibrils are composed of abnormally folded proteins that accumulate and aggregate, causing tissue damage and inflammation.
**Why the Correct Answer is Right**
Amyloidosis can be primary (AL amyloidosis), secondary (AA amyloidosis), or hereditary (ATTR amyloidosis), with differing pathophysiologies. The deposition of amyloid fibrils in organs such as the kidneys, liver, and heart disrupts normal tissue function, leading to symptoms like nephrotic syndrome, hepatomegaly, and cardiac failure. The presence of amyloid fibrils can be detected by biopsy or imaging studies, and treatment often involves addressing the underlying cause and managing symptoms.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because amyloidosis is not caused by a single genetic mutation; rather, it is a complex disorder involving multiple genetic and environmental factors.
* **Option B:** This option is incorrect because amyloidosis is not typically associated with autoimmune disorders; instead, it often results from chronic inflammation or infections.
* **Option C:** This option is incorrect because amyloidosis is not a form of cancer; while some amyloidosis types are associated with malignancies, the underlying pathology is distinct.
**Clinical Pearl / High-Yield Fact**
Amyloidosis can mimic other diseases, such as multiple myeloma, lymphoma, or chronic inflammatory disorders, making accurate diagnosis crucial. A high index of suspicion and careful clinical evaluation are essential for early detection and treatment.
**Correct Answer:**
.