Bilateral Mediastinal Lymphangiohemangiomas Containing Anomalous Venous Components - A case report -

Area of Science:

• Thoracic Surgery
• Pediatric Oncology
• Vascular Malformations

Background:

• Lymphangiohemangiomas are rare benign tumors, often presenting in the head, neck, or axilla.
• Mediastinal lymphangiohemangiomas are exceedingly rare, with limited published cases.
• Bilateral presentation of mediastinal lymphangiohemangiomas is exceptionally uncommon.

Observation:

• A 7-year-old boy presented with an incidental abnormal mediastinal shadow on chest X-ray.
• Chest CT revealed large masses in the left superior and right posterior mediastinum.
• Anomalous venous connections were identified: left mass to the left innominate vein, right mass to the left atrium.

Findings:

• Surgical excision of the left-sided mass was performed first, followed by the right-sided mass one month later.
• Careful dissection and ligation of anomalous venous channels were crucial during the procedures.
• The patient experienced no complications and showed no recurrence 30 months post-operation.

Implications:

• This case highlights the possibility of bilateral mediastinal lymphangiohemangiomas, a previously unreported occurrence.
• Successful surgical management demonstrates the feasibility of treating these rare bilateral malformations.
• The findings contribute to the limited literature on mediastinal lymphangiohemangiomas, aiding future diagnosis and treatment strategies.