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
[{'content': 'Following are the various causes of edema except: \nSelect and explain. \nA. Increase in hydrostatic pressure, B. Decreased colloid osmotic pressure, C. Due to lymphatic obstruction, D. Decrease in intravascular pressure', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Approximately\xa060%\xa0of\xa0lean\xa0body\xa0weight\xa0is\xa0water,\xa0two-thirds\xa0of\xa0which\xa0is\xa0intracellular.\xa0Most\xa0of\xa0the\xa0 remaining\xa0water is found in extracellular compartments in the form of interstitial fluid; only 5% of the body’s water is in blood\xa0plasma.\xa0 As\xa0noted\xa0earlier,\xa0edema\xa0is\xa0an\xa0accumulation\xa0of interstitial fluid within tissues.\xa0\n\nIncreases in hydrostatic pressure are mainly caused by disorders that impair venous return. Local increases in intravascular pressure caused, for example, by deep venous thrombosis in the lower extremity can cause edema restricted to the distal portion of the affected leg.\nReduction of plasma albumin concentrations leads to decreased colloid osmotic pressure of the blood and loss of fluid from the circulation.\nEdema may result from lymphatic obstruction that compromises resorption of fluid from interstitial spaces.\n\nRobbins BASIC\xa0 PATHOLOGY T E N T H\xa0 \xa0E D I T I O N page no.99', 'role': 'assistant'}]