In IVP, Adder head appearance is seen in:: (A) Polycystic kidney, (B) Horse shoe kidney, (C) Ureterocele, (D) Hydronephrosis
Answer is C. Ureterocele is a cystic dilatation of the distal ureter. Cobra head or Adder head appearance is diagnostic of ureterocele. Spider leg appearance in polycystic kidney. Ref: Bailey & Love, 25th Edition, Page 1290