**Question:** True about duplication of intestine is -

A) Spherical type is MC
B) Tubular type is attached longitudinally with bowel
C) Spherical cyst communicates with lumen
D) All of the above

**Correct Answer:**

**Core Concept:** Duplication cyst is a rare congenital anomaly where a part of the digestive tract or other organs duplicates during embryonic development. These cysts can be classified into various types based on their structure, location, and communication with the bowel.

**Why the Correct Answer is Right:**

Duplication cysts can be of various types:

1. Spherical type: This type is also known as Meckel's diverticulum. It is the most common type and consists of a blind-ending pouch of the intestinal mucosa, usually arising from the antimesenteric border of the distal ileum. It is true that this type is mesodermal in origin (MC).
2. Tubular type: This type is less common and consists of a tubular structure connected longitudinally with the bowel. The tubular cyst communicates with the bowel lumen, allowing the passage of fecal matter.
3. Spherical cyst communicates with the lumen: This type is true, as it is a spherical cyst that communicates with the intestinal lumen, allowing the passage of fecal matter as well.

**Why Each Wrong Option is Incorrect:**

A) Spherical type is mesodermal in origin (MC) - While true for Spherical type, this option is not specific to the duplication cyst.

B) Tubular type is attached transversely - Correct but not specific to the duplication cyst, as other congenital anomalies like Meckel's diverticulum can also have this type of attachment.

C) Spherical cyst communicates with the lumen - Correct but not specific to the duplication cyst, as other congenital anomalies like Meckel's diverticulum can also have this feature.

D) All of the above - This option covers all types of duplication cysts, making it the correct answer.

**Clinical Pearls:**

Understanding the different types of duplication cysts helps in making a proper diagnosis and treatment plan for patients with these anomalies. Clinicians should be aware that duplication cysts can present with symptoms like abdominal pain, vomiting, or gastrointestinal bleeding, which may lead to surgical intervention if not diagnosed early. Early identification and management of duplication cysts can prevent potential complications like intussusception, bowel obstruction, or malignant degeneration.