Intrathyroid Thymic Carcinoma With Papillary Carcinoma Of Thyroid:A Case Report

Abstract Intrathyroid thymic carcinoma ( ITTC ) is an inert malignant tumor, which often occurs in the neck or thyroid soft tissue. It is difficult to distinguish ITTC from other thyroid tumors. There is no specificity in clinical manifestations and imaging. In addition, there are few cases of ITTC combined with papillary thyroid carcinoma(PTC). Here we report a 44-year-old man with left neck mass admitted to the First Affiliated Hospital of Gannan Medical College in June 2017. Ultrasound showed thyroid nodules in bilateral lobes. The left lobe showed 48 × 55 mm hypoechoic signal, and the right lobe showed 5.6 × 4.2 mm hypoechoic signal. Because the right nodule was small, it was not treated. The left thyroid nodule was finally diagnosed as ITTC by pathological diagnosis. No special treatment was performed after left lobectomy. In June of the next year, due to physical examination found on the right thyroid tumor again in our hospital, the patient came to our hospital for treatment again. The pathological diagnosis was papillary thyroid carcinoma, and then the right lobe of the thyroid was resected. Combined with the history of patients, the patient suffered from left thyroid endothoracic adenocarcinoma with right thyroid papillary tumor. In this study, the clinical pathological characteristics, immune phenotype and differential diagnosis of thyroid endothoracic adenocarcinoma were analyzed and discussed, providing information and reference for the majority of medical researchers and clinical workers.