**Question:** Most common cause of fresh bleeding per rectum in a 5 year old child is -

A. Haemorrhoids
B. Anal fissure
C. Diverticulosis
D. Colorectal cancer

**Core Concept:**
The underlying principle being tested in this question is understanding the common causes of fresh bleeding per rectum in pediatric patients, specifically focusing on the most likely diagnosis for a 5-year-old child. In this age group, the primary causes are typically benign rather than malignant conditions.

**Why the Correct Answer is Right:**
In this case, the correct answer is C - Diverticulosis. Diverticulosis is a condition characterized by the formation of small, pouch-like outpouchings (diverticula) in the colon, most commonly in the sigmoid colon. It is a benign condition often seen in adults, particularly those with a western lifestyle and diet. In contrast, a 5-year-old child is too young to develop diverticulosis, making it the least likely option.

**Why Each Wrong Option is Incorrect:**
A. Haemorrhoids (Haemorrhoids) are another benign condition, but they are more common in older children and adults rather than 5-year-olds.
B. Anal fissure is an inflammation and tear in the anal canal, usually caused by chronic constipation or straining during defecation. While it can cause bleeding per rectum, it is also less likely in a 5-year-old child.
D. Colorectal cancer is a malignant condition, which is extremely rare in pediatric patients, particularly in this young age group.

**Clinical Pearl:**
In evaluating bleeding per rectum in pediatric patients, it's essential to consider age-specific conditions. Diverticulosis is a common cause in adults but is extremely rare in a 5-year-old child. Assessing the patient's age, clinical history, and symptoms can help narrow down the differential diagnosis and guide further diagnostic and treatment steps.