A 35-year-old woman presents with symptoms of dyspnea. Chest films detects the presence of an anterior mediastinal cystic mass.
Correct answer: C – Multilocular thymic cyst (MTC)
MTC is a cystic benign tumoral lesion in the anterior mediastinum. This benign tumor is more common in adults of all ages and of either sex. This tumor is highly unusual in children where the most common lesion is a unilocular thymic cyst. Clinically and radiographically, MTC may be difficult to distinguish from cystic thymomas or from other more common thymic tumors that may have a cystic component. MTC is most likely to be diagnosed after complete surgical resection rather than with a needle biopsy or with cytology. These tumors have the potential to recur if complete surgical resection is not accomplished. Complete surgical resection is curative in these patients.