Thymolipoma Association with Myasthenia Gravis: Case Report

Area of Science:

• Oncology
• Immunology
• Cardiology

Background:

• Thymolipoma is an uncommon benign thymic neoplasm, comprising 9% of thymic tumors.
• Incidence is approximately 0.12 per 100,000 cases annually, with a predilection for younger populations.
• A significant association exists between thymolipoma and autoimmune diseases, notably myasthenia gravis.

Observation:

• A 56-year-old female with myasthenia gravis presented with severe cardiac issues including congestive heart failure and stroke.
• The patient underwent mitral valve replacement and extended thymectomy.
• Histopathological analysis confirmed thymolipoma in the resected thymus.

Findings:

• The case highlights thymolipoma as a potential anterior mediastinal mass in older myasthenia gravis patients, particularly those on steroids.
• Extended thymectomy alongside cardiac surgery is a feasible approach.
• Complete remission rates post-resection in myasthenia gravis patients with thymolipoma warrant further investigation.

Implications:

• This case underscores the importance of considering thymolipoma in the differential diagnosis of anterior mediastinal masses in specific patient demographics.
• Surgical management involving concomitant cardiac procedures and thymectomy is viable.
• Further research is needed to establish the efficacy of thymectomy for myasthenia gravis remission in thymolipoma cases.