Objective To analyze the pattern of lymph node (LN) metastasis and its effect on prognosis in sinonasal mucosal melanoma (SNMM). Methods This retrospective study was conducted based on the Surveillance, Epidemiology, and End Results (SEER) Program data. Survival outcomes were analyzed using the Kaplan-Meier method. Factors were compared between groups using log-rank test and Fisher’s exact test, and prognostic factors were screened using the Cox proportional hazards model. Propensity score matching (PSM) was conducted to examine the treatment differences after accounting for sex, age, race, T stage, N stage, and M stage. Results Level I (57.1%) and level II (53.6%) nodes were the most common sites of lymph node metastasis, followed by level III (17.9%) and IV (17.9%) nodes. T stage, M stage, and tumor size were associated with LN metastasis. The 5-year overall survival rates for patients without and with LN metastasis were 35.2% and 5.3%, respectively. Conclusions Level I and II lymph nodes may be the sentinel nodes of SNMM, Advanced T stage and increasing tumor size could promote LN metastasis. LN metastasis may promote distant metastasis and remains an important prognostic factor for patients with SNMM.
Background
Whether patients with medullary thyroid carcinoma (MTC) who have unresectable synchronous distant metastases should undergo primary surgical resection (PTR) remains controversial. This study aimed to identify predictive factors associated with the survival of such patients.
Methods
We conducted a retrospective study of patients with MTC who were registered in the Surveillance, Epidemiology, and End Results registry. The overall and cancer‐specific mortality rates were assessed using risk‐adjusted Cox proportional hazards regression modeling and stratified propensity score matching.
Results
One hundred and eight matched patients were assessed. Patients in the PTR group had lower overall mortality than did those in the non‐PTR group. The 1‐, 3‐, and 5‐year overall and cancer‐specific survival rates in the PTR group were significantly higher.
Conclusions
PTR appears to be the most appropriate intervention for patients with good performance status. Such patients are likely to benefit from surgery and to experience long‐term stable disease.
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