Subxiphoid completion thymectomy for refractory non-thymomatous myasthenia gravis

Area of Science:

• Thoracic Surgery
• Neurology
• Immunology

Background:

• Refractory myasthenia gravis (MG) may necessitate thymectomy for complete thymic tissue clearance.
• Completion thymectomy aims to remove residual or ectopic thymic tissue in the mediastinum or neck.
• Subxiphoid video-assisted thoracoscopy is a minimally invasive technique for this procedure.

Purpose of the Study:

• To evaluate the short- and long-term outcomes of completion thymectomy using a subxiphoid video-assisted thoracoscopic approach.
• To assess the impact of the procedure on anti-acetylcholine receptor antibody titers.
• To determine the correlation between antibody reduction and clinical remission in refractory MG patients.

Main Methods:

• A consecutive series of 15 patients with refractory non-thymomatous MG underwent subxiphoid video-assisted completion thymectomy.
• Data collected included operative time, postoperative pain, hospital stay, and antibody levels.
• Follow-up assessments evaluated clinical remission and functional improvement.

Main Results:

• No operative deaths or major morbidity were reported.
• A significant decrease in anti-acetylcholine receptor antibodies was observed one month post-surgery (-67% median change).
• Complete stable remission was achieved in 5 patients, with 9 others showing significant functional improvement and reduced medication needs.

Conclusions:

• Subxiphoid completion thymectomy is a safe and effective method for removing residual thymus in refractory MG.
• The procedure leads to a reduction in anti-acetylcholine receptor antibody titers.
• Reduced antibody levels correlate significantly with improved clinical outcomes and remission in refractory MG.