Thymic Neuroendocrine Tumor Presenting with Cervical Lymphadenopathy: A Case Report and Diagnostic ChallengeXiaohui Xie2, Jinming Tang, Wenxiang Wang1, Desong Yang1, Kele Qin1*1 Second Department of Thoracic Surgery, Hunan Cancer Hospital, Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University, Tongzipo Road 283, Changsha 410013, China.2Department of Cardiovascular Surgery, the Second Xiangya Hospital, Central South University, Middle Renmin Road 139, Changsha 410011, China.Correspondence: qinkeke@hnca.org.cnAddress: Hunan Cancer Hospital, Tongzipo Road 283, Changsha 410013, China.