In congenital pyloric stenosis the defect usually lies in the antral:: (A) Nerve fibers, (B) Circular muscle fibers, (C) Longitudinal muscle fibers, (D) Mucosa
Answer is B. Ans. (b) Circular muscle fibersRef: Bailey and Love 26th Edition, Page 113* Circular muscle hypertrophy results- hence pyloromyotomy we cut these muscles