Analysis of survival and prognostic factors of thymic neuroendocrine tumors.

Abstract

e20622 Background: To investigate the clinical characteristics of thymic neuroendocrine tumors and the relationship between treatment and survival prognosis. Methods: 69 patients, including 54 males and 15 females, who were diagnosed with NETT by puncture or surgical pathology in the First Affiliated Hospital of Zhengzhou University from September 2011 to October 2021 were retrospectively analyzed for initial symptoms, Pathological type, lesion size, treatment and prognosis of survival. Results: The median age of the 69 patients was 53 years old (28-83 years old), the median maximum diameter of the primary lesion was 6.85 cm (1.1-14.9 cm), and the clinical manifestations were not specific. The most common initial symptom was chest tightness and chest pain for 20 cases, 19 cases with hidden disease, found during physical examination. The manifestations of local invasion and metastasis included cough (6 cases), neck and face swelling (9 cases), retrosternal discomfort (3 cases), and low back pain (4 cases). There were 6 cases with systemic manifestations (anorexia, fatigue and fever). Only one case showed ectopic ACTH syndrome. The pathological types included 46 cases of well-differentiated neuroendocrine tumors (5 cases of typical carcinoid tumors, 41 cases of atypical carcinoid tumors), 23 cases of poorly differentiated neuroendocrine tumors (13 cases of small cell carcinomas, 3 cases of large cell neuroendocrine carcinomas, and high-grade neuroendocrine carcinomas). 7 cases of endocrine carcinoma). Masaoka-Koga staging: 2 cases of stage I, 10 cases of stage II, 20 cases of stage III, and 37 cases of stage IV. Thirty patients received surgical treatment, and 19 received postoperative adjuvant therapy. Long-term follow-up results showed a median overall survival time of 49.5 months. Univariate analysis showed that surgery could improve PFS (P = 0.009), while postoperative comprehensive treatment had no effect on PFS (P = 0.724). Pathological grade (P < 0.001), Masaoka-Koga stage (P = 0.004), and surgery (P = 0.014) were associated with OS. Multivariate analysis showed that pathological grade was an independent factor affecting OS (HR: 7.133; 95%CI: 2.183-23.306; P = 0.001). Conclusions: Thymic neuroendocrine tumor is a rare malignant tumor, and pathological grade is an independent risk factor for prognosis. Surgery can improve the patient's PFS.