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Identification of distinct genomic features reveals frequent somatic AHNAK and PTEN mutations predominantly in primary malignant melanoma presenting in the ureter.

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机构： [1]Department of Urology, Cancer Hospital of China Medical University, Liaoning Cancer Hospital and Institute, Shenyang, Liaoning, China. [2]Department of Radiology, Sichuan Province Orthopedic Hospital, Chengdu, Sichuan, China. [3]Department of Urology, Second Affiliated Hospital of Dalian Medical University, Dalian, Liaoning, China. [4]Department of Pathology, Dalian Friendship Hospital, Dalian, Liaoning, China. [5]First Clinical College, Dalian Medical University, Dalian, Liaoning, China. [6]Department of Biochemistry, Institute of Glycobiology, Dalian Medical University, Dalian, Liaoning, China

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关键词： primary malignant melanoma (PMM) of the ureter whole-exome sequencing (WES) molecular pathogenesis clinicopathological characteristic SEER prognostic factor

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Primary malignant melanoma of the ureter is extremely rare. Genetic variants to the increased risk of developing the disease have not yet been investigated.Tumour mutation profiling for primary malignant melanoma of the ureter was performed by whole-exome sequencing. Immunohistochemistry was performed to verify histopathological features and the variants of predisposing genes and driver mutation genes. Furthermore, we conducted a literature review and Surveillance, Epidemiology and End Result-based study by searching public databases.We identified 38 somatic single nucleotide variants and 9 somatic insertions and deletions (INDELs) in tumour specimens. After filtering with the Cancer Gene Census database, seven predisposing genes and two driver mutation genes were identified. Moreover, the immunohistochemical profile showed that tumour cells were positive for Melan-A, melanoma gp100 human melanoma black 45 (HMB45), S100 beta and P53. The expression levels of two driver mutation genes (phosphatase and tensin homolog (PTEN) and desmoyokin (AHNAK) and five predisposing genes (AT-rich interaction domain 1B (ARID1B), catalase, eukaryotic translation initiation factor 4 gamma 3 (EIF4G3), ANK3 and collagen type I) were significantly downregulated in tumour tissues compared to paracancerous tissues. In the literature review and Surveillance, Epidemiology and End Results-based study, patients with primary malignant melanoma of the urinary tract had worse clinical outcomes than patients with primary urothelial carcinoma after 1:2 propensity score matching (P = 0.010). Additionally, Cox multivariate analysis for patients with primary malignant melanoma of the urinary tract indicated that distant metastasis (hazard ratio = 1.185; P = 0.044) was an independent predictor for overall survival, and tumour focality (hazard ratio = 0.602; P = 0.017) and non-surgery (hazard ratio = 0.434; P = 0.003) were independent factors for tumour progression.Our study is the first to provide evidence that the distinct phenotypes of primary malignant melanoma of the ureter may be due to different genetic variations. The prognosis of primary malignant melanoma of the urinary tract was poorer than that of primary urothelial carcinoma of the urinary tract.© The Author(s) 2022. Published by Oxford University Press. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.

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出版当年[2022]版：

大类 | 4 区医学

小类 | 4 区肿瘤学

最新[2025]版：

大类 | 4 区医学

小类 | 4 区肿瘤学

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Q4 ONCOLOGY

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Q3 ONCOLOGY

影响因子： 2.2 最新[2024版] 2.4 最新五年平均 2.4 出版当年[2022版] 2.6 出版当年五年平均 2.925 出版前一年[2021版] 1.9 出版后一年[2023版]

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第一作者机构： [1]Department of Urology, Cancer Hospital of China Medical University, Liaoning Cancer Hospital and Institute, Shenyang, Liaoning, China.

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通讯机构： [1]Department of Urology, Cancer Hospital of China Medical University, Liaoning Cancer Hospital and Institute, Shenyang, Liaoning, China. [3]Department of Urology, Second Affiliated Hospital of Dalian Medical University, Dalian, Liaoning, China. [6]Department of Biochemistry, Institute of Glycobiology, Dalian Medical University, Dalian, Liaoning, China [*1]Department of Urology, Cancer Hospital of China Medical University, Liaoning Cancer Hospital and Institute, No. 44, Xiaoheyan Road, Shenyang, Liaoning, China [*2]Department of Urology, Second Affiliated Hospital of Dalian Medical University, No. 467, Zhongshan Road, Dalian, Liaoning, China [*3]Dalian Medical University, Dalian, Liaoning, China

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Identification of distinct genomic features reveals frequent somatic AHNAK and PTEN mutations predominantly in primary malignant melanoma presenting in the ureter.

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