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[Multilocular Thymic Cyst with Calcification;Report of a Case]
Hiroshi Matsui1, Yohei Taniguchi, Tomohito Saito
1Department of Thoracic Surgery, Kansai Medical University, Hirakata, Japan.
Kyobu Geka. the Japanese Journal of Thoracic Surgery
|October 8, 2019
Summary
A multilocular thymic cyst with calcification was diagnosed in a middle-aged woman presenting with an anterior mediastinal mass. This rare thymic lesion did not infiltrate surrounding tissues, offering a favorable surgical outcome.
Area of Science:
- Thoracic Surgery
- Pathology
- Radiology
Background:
- Anterior mediastinal masses can present diagnostic challenges, with teratomas being a common consideration.
- Imaging modalities like chest computed tomography (CT) are crucial for characterizing mediastinal lesions.
Observation:
- A female patient in her 40s presented with an abnormal chest X-ray finding.
- Chest CT revealed an anterior mediastinal cystic mass exhibiting calcification.
- Surgical exploration showed the mass connected to the thymus without local infiltration.
Findings:
- Macroscopic examination revealed a multiloculated cyst with fibrous walls.
- Microscopic analysis identified thymic tissue within the cyst wall, excluding thymic epithelial tumors and teratomas.
- Histopathology confirmed the presence of collagen fibers, cholesterol clefts, and calcification within the cyst wall.
Implications:
- The diagnosis of multilocular thymic cyst with calcification is established based on characteristic histopathological features.
- This benign thymic cyst represents a rare differential diagnosis for anterior mediastinal masses.
- Accurate preoperative diagnosis and surgical management are essential for favorable patient outcomes.

