This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pathology
All are features of haemolytic uremic syndrome, except- 
Select and explain. 
A. Hyperkalemia, B. Anaemia, C. Renal microthrombi, D. Neuro psychiatric disturbances
D: Neuro psychiatric disturbances
Answer: D: Neuro psychiatric disturbances 
Explanation: Ans. is 'd' i.e., neuropsychiatric manifestations Hyperkalemia is seen in hemolytic urenic syndrome as a result of renal failure. ABOUT NEUROPSYCHIATRIC MANIFESTATIONS o Neurological manifestations are used to distinguish between Hemolytic uremic syndrome and Thrombotic Throm bocytopenic Purpura. o H.U.S. is distinguished from T.T.P by the absence of neurological symptoms and the prominence of acute renal failure. o Recent studies, however have tended to blurr these clinical distinctions. Many adult patients with "T. T.P. lack one or more of the five criteria and patients with "HUS" have fever and neurological dysfunction.