<prompt> A Sentinel pile indicatesInternal hemorrhoidsPilonidal sinusFissure in anoFistula in ano  <response>: Ans. c Fissure in ano Ref. Bailey and Love Surgery 26th1250; Ref. Q. 216 of MH-2007.SENTINEL PILE- This misnomer is given to a skin tag marking--and often containing within it--the distal end of an anal fissure, found usually in the posterior midline. 