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: Surgery
Non-metabolic cause of abdominal pain: March 2011, March 2013 
Select and explain. 
A. DKA, B. Sickle cell anemia, C. Hyperparathyroidism, D. Porphyria
B: Sickle cell anemia
Answer: B: Sickle cell anemia 
Explanation: Ans. B: Sickle cell anemia Medical causes of abdominal pain include 1) diabetic ketoacidosis, 2) porphyria and 3) pain arising from the hea or lungs Sickle cell anemia leads to abdominal pain because of visceral blood stasis (non metabolic abnormality) Primary hyperparathyroidism presents with the classic quaet of stones, bones, abdominal groans and psychic moans