Frontalis sling procedure for ocular myasthenia gravis

Area of Science:

• Ophthalmology
• Neurology
• Plastic Surgery

Background:

• Myasthenia gravis is an autoimmune disorder affecting neuromuscular junctions.
• Ocular myasthenia gravis specifically impacts eye muscles, leading to ptosis (droopy eyelids) and diplopia (double vision).
• Conventional treatments like cholinesterase inhibitors and steroids often have limited efficacy for severe ptosis in ocular myasthenia gravis.

Observation:

• A 39-year-old female patient, diagnosed with myasthenia gravis at age 8, presented with persistent bilateral ptosis.
• Despite trials of various medications, her levator muscle function remained significantly impaired (3 mm bilateral function).
• Crucially, she had no associated eye movement abnormalities, suggesting isolated levator muscle involvement.

Findings:

• Bilateral frontalis sling procedures were performed using autologous fascia lata to address the levator dysfunction.
• One year post-surgery, the patient exhibited symmetrically elevated upper eyelids.
• The functional outcome was deemed good, with significant improvement in eyelid height and visual field obstruction.

Implications:

• Frontalis sling surgery using autologous fascia lata is a viable and effective surgical option for correcting ptosis in ocular myasthenia gravis.
• This technique offers a durable solution for patients with severe levator dysfunction unresponsive to medical management.
• The procedure can significantly improve quality of life by restoring eyelid function and aesthetics.