Apple peel bowel with loss of dorsal mesentry is a feature of which type of ileal atresia
## Core Concept
The question pertains to a specific type of intestinal atresia characterized by an "apple peel" appearance of the bowel, which is associated with a particular embryological defect. This condition involves a failure in the normal development of the intestine, specifically related to the formation and maintenance of the mesentery.
## Why the Correct Answer is Right
The "apple peel" or "Christmas tree" deformity of the bowel is characteristic of a type of intestinal atresia known as Type 3 or "apple peel" atresia. This condition is associated with a significant loss of the dorsal mesentery, leading to the bowel having a characteristic appearance. The atresia results from an interruption in the blood supply to the intestine during fetal development, specifically affecting the superior mesenteric artery or its branches. The absence of a portion of the mesentery leads to the bowel segments being connected in an "apple peel" fashion.
## Why Each Wrong Option is Incorrect
- **Option A:** This option does not correspond to the description of "apple peel" bowel with loss of dorsal mesentery. Without specific details on the options, we can infer that Type 1 and 2 atresias do not involve such a significant loss of mesentery or the characteristic "apple peel" appearance.
- **Option B:** Similarly, this option does not match the description provided, suggesting other types of atresias that do not involve the extensive loss of dorsal mesentery or the specific morphological changes.
- **Option D:** This option is also incorrect as it does not align with the characteristics of "apple peel" bowel and loss of dorsal mesentery.
## Clinical Pearl / High-Yield Fact
A key point to remember is that intestinal atresias are often associated with other anomalies, and the "apple peel" type has a particularly high association with malrotation and other intestinal anomalies. Clinically, these patients may present with signs of intestinal obstruction shortly after birth.
## Correct Answer: C. Type 3.