Nucl Med Mol Imaging.  2016 Jun;50(2):161-163. 10.1007/s13139-016-0404-2.

A Rare Case of Multilocular Thymic Cyst with Follicular Lymphoid Hyperplasia: Radiologic and Histopathologic Features

• Kim JS
• Cha EJ

• KMID: 2257005
• DOI: http://doi.org/10.1007/s13139-016-0404-2

Abstract

Multilocular thymic cysts are rare and acquired lesions induced by an inflammatory arising within the thymus. We report a rare case of multilocular thymic cyst with follicular lymphoid hyperplasia in a 59-year-old female. Chest CT and MRI revealed a large multilocular cystic mass, which contains thick septa and nodules in the thymus. F-18 FDG PET/CT showed almost no FDG uptake of the multilocular cystic mass but moderate FDG uptake of the solid nodules. Extended total thymectomy was performed. Histopathological findings revealed follicular lymphoid hyperplasia of thymic tissue but no neoplastic lesion. Based on these findings, diagnosis of multilocular thymic cyst with follicular lymphoid hyperplasia was made. This is a rare case that preoperatively was difficult to diagnose.

Keyword

Thymiccyst; Lymphoidhyperplasia; F-18FDG; Positron-emission tomography; Computed tomography

MeSH Terms

Diagnosis
Female
Humans
Hyperplasia*
Magnetic Resonance Imaging
Mediastinal Cyst*
Middle Aged
Positron-Emission Tomography
Positron-Emission Tomography and Computed Tomography
Thymectomy
Thymus Gland
Tomography, X-Ray Computed