**Core Concept**
Senile systemic amyloidosis, also known as AL amyloidosis, is a condition characterized by the deposition of amyloid fibrils in various organs due to the accumulation of light chain immunoglobulins. This condition is often associated with age-related decline in renal function and can lead to significant morbidity.

**Why the Correct Answer is Right**
The correct answer is related to the pathophysiology of senile systemic amyloidosis. The deposition of amyloid fibrils in organs such as the kidneys, liver, and heart leads to organ dysfunction. The light chain immunoglobulins responsible for amyloid deposition are typically produced by plasma cells, which can be associated with age-related decline in renal function.

**Why Each Wrong Option is Incorrect**
**Option A:** Not directly related to the pathophysiology of senile systemic amyloidosis. While inflammation is a common feature of many diseases, it is not a key aspect of senile systemic amyloidosis.
**Option B:** While proteinuria is a common feature of many kidney diseases, it is not a defining characteristic of senile systemic amyloidosis. Other options like hematuria or hypertension may be more specific.
**Option C:** Not a characteristic of senile systemic amyloidosis. While some amyloidosis types are associated with genetic mutations, senile systemic amyloidosis is more related to age-related decline in renal function.

**Clinical Pearl / High-Yield Fact**
Senile systemic amyloidosis is often associated with age-related decline in renal function, and early diagnosis is crucial to prevent significant morbidity.

**Correct Answer:** C.