H16.253 Phlyctenular keratoconjunctivitis, bilateral

Name of the Condition

• Phlyctenular Keratoconjunctivitis, Bilateral

Summary

Phlyctenular keratoconjunctivitis is an inflammatory condition affecting the cornea and conjunctiva, characterized by the formation of small, raised nodules (phlyctenules). It often results from hypersensitivity reactions, particularly to microbial antigens, and may cause redness, irritation, and vision changes. Prompt evaluation is important to identify the underlying trigger and prevent complications.

Causes

The condition is typically triggered by hypersensitivity to bacterial or viral antigens, most commonly Staphylococcus aureus. It may also arise from allergic reactions, tuberculosis exposure, or other infectious agents. In some cases, it can be associated with systemic conditions like atopy or vitamin A deficiency.

Risk Factors

• Chronic Staphylococcus colonization of the eyelids or conjunctiva.
• Atopic dermatitis or other allergic conditions.
• Exposure to tuberculosis or other infectious agents.
• Vitamin A deficiency or malnutrition.
• Poor eyelid hygiene or chronic blepharitis.

Symptoms

• Small, raised nodules on the conjunctiva or cornea.
• Redness and swelling of the eye.
• Itching, burning, or gritty sensation.
• Excessive tearing or discharge.
• Blurred vision or sensitivity to light.
• Feeling of a foreign body in the eye.

Diagnosis

Diagnosis involves a comprehensive eye examination, including slit-lamp biomicroscopy to identify phlyctenules. Cultures or smears may be taken to detect microbial antigens, and additional tests (e.g., tuberculin skin test) may be performed to rule out underlying infections. A thorough history of symptoms and exposure is also critical.

Treatment Options

Treatment focuses on addressing the underlying cause and reducing inflammation. This may include topical antibiotics (e.g., for Staphylococcus), corticosteroid eye drops to control inflammation, and lubricating eye drops to relieve discomfort. In cases linked to tuberculosis, systemic therapy may be necessary. Allergic triggers may require antihistamines or allergen avoidance.

Prognosis and Follow-Up

With appropriate treatment, most cases resolve without long-term complications. However, recurrent episodes can occur if the underlying trigger is not addressed. Follow-up appointments are important to monitor healing, adjust treatment, and prevent scarring or vision impairment. Patients should be advised to avoid known triggers and maintain good eyelid hygiene.

Complications

Untreated or recurrent phlyctenular keratoconjunctivitis can lead to corneal scarring, which may cause permanent vision changes. Severe inflammation may also increase the risk of secondary infections or ulceration. Prompt management is key to minimizing these risks.

Lifestyle & Prevention

• Practice good eyelid hygiene (e.g., gentle cleansing with warm water).
• Avoid known allergens or irritants.
• Ensure adequate nutrition, particularly vitamin A.
• Seek prompt treatment for eyelid infections or chronic blepharitis.
• Follow up with an eye care professional if symptoms persist or worsen.

When to Seek Professional Help

Consult an eye care provider if you experience persistent eye redness, pain, vision changes, or discharge. Immediate care is needed if symptoms worsen rapidly, as this may indicate a more serious condition like corneal ulceration.

Tips for Medical Coders

Use code H16.253 for bilateral phlyctenular keratoconjunctivitis. Document the bilateral nature of the condition and any identified triggers (e.g., microbial antigens, allergies) to support coding accuracy. Ensure clinical notes specify the involvement of both eyes to justify the bilateral designation.