An 8 year old child is brought with c/o severe abdominal pain. O/E palpable purpura is noted. There is history of recent diarrhea which is completely resolved. What is the expected pathological finding in kidney?
**Core Concept**
The underlying condition being tested involves a form of vasculitis that affects small blood vessels, typically presenting with **palpable purpura**, abdominal pain, and sometimes kidney involvement. This condition is often preceded by an infectious illness, such as diarrhea. The key principle here is the association between a recent infection and the development of a specific type of vasculitis.
**Why the Correct Answer is Right**
The correct answer is related to **Henoch-Schönlein purpura (HSP)**, a form of vasculitis that can affect the kidneys, among other organs. HSP is known to follow infections and can cause abdominal pain, purpura, and renal involvement. The pathological finding in the kidney would be consistent with **immune complex deposition**, leading to inflammation of the glomeruli, known as **glomerulonephritis**.
**Why Each Wrong Option is Incorrect**
**Option A:** This choice might refer to a different condition or finding not associated with HSP or the clinical presentation given.
**Option B:** Similarly, this could represent an incorrect pathological finding or condition unrelated to the expected outcome in HSP.
**Option C:** This option might be a plausible but incorrect choice, not aligning with the typical renal pathology seen in HSP.
**Clinical Pearl / High-Yield Fact**
A key point to remember is that HSP can lead to renal complications, including **glomerulonephritis**, which may present with hematuria or proteinuria. Recognizing the link between recent infections, palpable purpura, and potential kidney involvement is crucial for early diagnosis and management.
**Correct Answer:** D. Glomerulonephritis.