What is the most common etiology of a nasolacrimal duct obstruction in elderly patients?

What is the most common etiology of a nasolacrimal duct obstruction in elderly patients?

• A. Valve of Hasner incomplete closure
• B. Actinomyces israeli infection
• C. Staph aureus infection
• D. Involutional changes

Answer: (D)

Involutional changes describe age-related degenerative remodeling of the lacrimal drainage system that leads to narrowing and fibrosis of the canaliculi and nasolacrimal duct. This gradual, degenerative process is the most common cause of acquired nasolacrimal duct obstruction in the elderly, producing chronic tearing and recurrent infections due to impaired tear drainage. Congenital issues like the valve of Hasner cause obstruction in infancy, not in older adults. Infections such as Actinomyces israeli or Staphylococcus aureus can contribute to irritation or secondary obstruction, but they are not the typical primary etiology in the elderly.

Involutional changes describe age-related degenerative remodeling of the lacrimal drainage system that leads to narrowing and fibrosis of the canaliculi and nasolacrimal duct. This gradual, degenerative process is the most common cause of acquired nasolacrimal duct obstruction in the elderly, producing chronic tearing and recurrent infections due to impaired tear drainage. Congenital issues like the valve of Hasner cause obstruction in infancy, not in older adults. Infections such as Actinomyces israeli or Staphylococcus aureus can contribute to irritation or secondary obstruction, but they are not the typical primary etiology in the elderly.