<prompt> A patient presented with midline pain at the marked dermatome shaded in green. Select the best possible answer, as a differential diagnosisAngina pectorisMeckels diveiculumAcute cholecystitisRenal colic  <response>: The green shaded area is the umbilical region, carrying T10 dermatome. Referred pain of mid-gut derivatives is felt in the peri-umbilical region T - 10. Meckels diveiculum is a mid-gut anomaly, presenting with pain around the umbilicus. 