## **Core Concept**
The optimum age for performing dacryocystorhinostomy (DCR) in children with congenital dacryocystitis is a critical consideration. Congenital dacryocystitis often results from a membranous obstruction at the lower end of the nasolacrimal duct. The condition may resolve spontaneously within the first year of life.

## **Why the Correct Answer is Right**
The correct answer, **6 months**, is considered optimal for several reasons. Performing DCR at this age balances the likelihood of spontaneous resolution with the need for surgical intervention. Most children with congenital nasolacrimal duct obstruction experience resolution by 6 to 9 months of age. If symptoms persist beyond this age, surgical intervention like DCR is often recommended. At 6 months, the procedure can be effective in relieving obstruction and preventing complications such as recurrent infections.

## **Why Each Wrong Option is Incorrect**
* **Option A: 2 months** - At 2 months, spontaneous resolution is still a possibility, and immediate surgery might not be necessary. Early intervention may increase the risk of complications.
* **Option B: 2 years** - Waiting until 2 years may lead to recurrent infections and potential complications, such as dacryocystocele or orbital cellulitis, which could have been prevented with earlier intervention.
* **Option D: 10 years** - Delaying surgery until 10 years of age would likely result in prolonged suffering from symptoms and increased risk of long-term complications.

## **Clinical Pearl / High-Yield Fact**
A key point to remember is that probing of the nasolacrimal duct is often recommended as a first-line treatment before considering DCR, typically around 6-9 months of age. However, in cases where probing fails or there's significant anatomical obstruction, DCR may be considered.

## **Correct Answer:** . **6 months**