A 7-year-old boy has coffee ground vomit and previous unexplained nose bleeds. He is systemically well with no abdominal tenderness. His full blood count is normal.
A. Full blood count
B. Coagulation screen/clotting screen
C. Liver function tests
D. Ultrasound scan of abdomen
E. X-ray of abdomen
Ans. The key is B. Coagulation screen/clotting screen. [Unexplained bleeding tendency in a boy is likely due to bleeding disorder