Minimum amount of GI bleed to cause malena is: (A) 10 ml, (B) 40 ml, (C) 60 ml, (D) 115 ml
Answer is C. Melaena refers to the passage of typical black, tarry coloured foul smelling stool. It signifies upper GI bleed. At least 50-60 ml bleeding should be there to cause melaena. Reference : page 834 SRB's manual of surgery 5th edition