**Question:** The features of Hemolytic Uremic Syndrome in children include

A. Confusion
B. Jaundice
C. Hematuria
D. Diarrhoea

**Core Concept:** Hemolytic Uremic Syndrome (HUS) is a rare but serious complication of diarrhea-associated illnesses like E. coli O157:H7 infection. It involves the rapid destruction of red blood cells (hemolysis), kidney damage (uremia), and microangiopathic changes in the blood vessels (thrombocytopenia and schistocytes on peripheral smear).

**Why the Correct Answer is Right:** The correct answer (C) describes the features of HUS, focusing on the renal and hematological aspects. Hematuria is a result of the microangiopathic changes in the blood vessels, leading to fragmentation of red blood cells. Thrombocytopenia is caused by platelet destruction and impaired platelet production.

**Why Each Wrong Option is Incorrect:**

A. Confusion (wrong option) is not a prominent feature of HUS, as cognitive dysfunction is typically seen in other conditions like encephalopathy or meningitis.
B. Jaundice (wrong option) is a result of impaired liver function due to various causes, not directly related to HUS.
D. Diarrhoea (wrong option) is a common presenting feature of diarrhea-associated illnesses, but not a characteristic feature of HUS itself.

**Clinical Pearl:** Diarrhea-associated HUS is a clinical entity that presents with diarrhea, followed by renal and hematological complications. Prompt recognition and management are crucial as it can lead to significant morbidity and mortality.

**Correct Answer:** C. Hematuria