Which statement about DCR approaches is true?

• A. DCR can be performed only via external approach
• B. DCR can be performed only via endonasal approach
• C. DCR can be performed via either external or endonasal approach
• D. DCR is not used for acquired NLDO

Answer: (C)

Dacryocystorhinostomy (DCR) can be done through either an external approach or an endonasal (endoscopic) approach. Both methods create a new passage between the lacrimal sac and the nasal cavity to bypass a blocked nasolacrimal duct, which relieves tearing from acquired NLDO. The choice between approaches depends on factors like cosmetic concerns (external scarring), surgeon experience, and anatomy, but success rates are comparable when performed by an experienced surgeon.

So, the statement that DCR can be performed via either external or endonasal approach is the true one. The idea that it’s limited to only one approach isn’t correct, and DCR is indeed used for acquired NLDO, not excluded from it.