A unilocular thymic cyst associated with true thymic hyperplasia: a challenging diagnosis especially in a child

Mona Mlika,1,2 Walid Gattoufi,1,2 Hazem Zribi,2 Emna Braham,1,2 Adel Marghli,2 Faouzi El Mezni1,21Department of Pathology, Abderrahman Mami Hospital, Tunis, Tunisia; 2Research Unit UR12SP16, Université Tunis El Manar, Faculté de Médecine de Tunis, Tunis El Manar, TunisiaAbstract: We report a new case of a mediastinal mass in a 19-year-old patient corresponding microscopically to an association of unilocular thymic cyst and true thymic hyperplasia. Our aim is to highlight the absence of specificity of clinical and radiological findings and the necessity of a thorough sampling of the tumor in order to establish the diagnosis.Keywords: true thymic hyperplasia, thymic cyst, microscopy, surgery