H04.613

Clinical Causes: Congenital formation due to developmental anomalies during embryogenesis Genetic factors that may influence the development of facial structures In some cases, acquired injuries or infections leading to fistula formation, although this is uncommon

Key Symptoms: Persistent tears flowing from the corners of both eyes Visible openings or scars on the eyelids or adjacent skin, often near the inner canthus Recurrent infections or inflammation around the tear drainage areas Discharge or crusting around the fistula openings Swelling or tenderness if an infection develops

Diagnosis Path: Diagnosis involves a combination of clinical examination and imaging studies. An ophthalmologist or an oculoplastic specialist typically performs the evaluation. Procedures may include: - Visual inspection of the eyelids and facial skin to identify abnormal openings - Syringing or probing of the lacrimal passages to assess blockages or abnormal connections - Imaging techniques such as dacryocystography, computed tomography (CT), or magnetic resonance imaging (MRI) to visualize the tear drainage system and fistula pathways. In some cases, the physician may also examine for associated anomalies, especially if part of a syndromic presentation.

Treatment Protocols: Treatment strategies focus on eliminating the abnormal fistula and restoring normal tear drainage. Approaches may include: - Surgical excision of the fistula tract to remove the abnormal connection - Dacryocystorhinostomy (DCR), a procedure to create a new tear drainage pathway if the main lacrimal system is obstructed - Antibiotics or anti-inflammatory medications if infections are present - Regular follow-up to ensure the fistula does not recur and that tear drainage is functioning properly Management plans are tailored to each patient's specific condition and anatomical considerations.