2020
DOI: 10.31557/apjcp.2020.21.11.3291
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Subtype Specific Nasopharyngeal Carcinoma Incidence and Survival Trends: Differences between Endemic and Non-Endemic Populations

Abstract: Background: While nasopharyngeal carcinoma (NPC) is rare in non-endemic regions such as the North America, endemic countries, such as Thailand, continue to struggle with high incidence and mortality rates. NPC has a complex etiology that varies by histological subtype. Methods: NPC cases (1990-2014) were identified using the International Classification of Diseases for Oncology (ICD-O) code C11 from the Chiang Mai, Khon Kaen, Lampang, and Songkhla cancer registries and compared to Asian/Pacific Islanders (A/PI… Show more

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Cited by 13 publications
(11 citation statements)
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“…Age at diagnosis (15‐39, 40‐49, 50‐59, 60‐69 and 70+ years), sex (female vs male), marital status at diagnosis (married vs unmarried) and year of diagnosis (1975‐1985, 1986‐1995, 1996‐2005 and 2006‐2018) were also obtained. NPC histology was classified as keratinizing squamous cell carcinoma (KSCC) (ICD‐O codes 8070 and 8071), differentiated non‐keratinizing squamous cell carcinoma (DNKC) (ICD‐O codes 8072 and 8073), undifferentiated non‐keratinizing squamous cell carcinoma (UNKC) (ICD‐O codes 8020, 8021, 8082 and 8010 [carcinoma, not other specified]) and others 14,15 . Besides, information regarding stage (localized, regional and distant), grade (grade I: “well differentiated,” grade II: “moderately differentiated,” grade III: “poorly differentiated” and grade IV: “undifferentiated or anaplastic”), radiation therapy (RT), chemotherapy and surgery were also extracted.…”
Section: Methodsmentioning
confidence: 99%
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“…Age at diagnosis (15‐39, 40‐49, 50‐59, 60‐69 and 70+ years), sex (female vs male), marital status at diagnosis (married vs unmarried) and year of diagnosis (1975‐1985, 1986‐1995, 1996‐2005 and 2006‐2018) were also obtained. NPC histology was classified as keratinizing squamous cell carcinoma (KSCC) (ICD‐O codes 8070 and 8071), differentiated non‐keratinizing squamous cell carcinoma (DNKC) (ICD‐O codes 8072 and 8073), undifferentiated non‐keratinizing squamous cell carcinoma (UNKC) (ICD‐O codes 8020, 8021, 8082 and 8010 [carcinoma, not other specified]) and others 14,15 . Besides, information regarding stage (localized, regional and distant), grade (grade I: “well differentiated,” grade II: “moderately differentiated,” grade III: “poorly differentiated” and grade IV: “undifferentiated or anaplastic”), radiation therapy (RT), chemotherapy and surgery were also extracted.…”
Section: Methodsmentioning
confidence: 99%
“…Age at diagnosis (15-39, 40-49, 50-59, 60-69 and 70+ years), sex (female vs male), marital status at diagnosis (married vs unmarried) and year of diagnosis (1975-1985, 1986-1995, 1996-2005 [carcinoma, not other specified]) and others. 14,15 Besides, information regarding stage (localized, regional and distant), grade (grade I: "well differentiated," grade II: "moderately differentiated," grade III: "poorly differentiated" and grade IV: "undifferentiated or anaplastic"), radiation therapy (RT), chemotherapy and surgery were also extracted. The SEER "Historic Stage" and "Combined Summary Stage" variables were used to define the stage at diagnosis.…”
Section: Study Populationmentioning
confidence: 99%
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“…Nasopharyngeal carcinoma (NPC) is an Epstein–Barr virus (EBV) associated epithelial head and neck neoplasm, with the highest incidence and mortality rates occurring in East and Southeast Asia and a 5-year survival rate of only approximately 50% for patients with advanced disease [ 1 , 2 ]. NPC is highly malignant, has a high recurrence rate, is prone to distant metastasis, and occurs as an advanced disease in more than 50% of patients at diagnosis [ 3 ].…”
Section: Introductionmentioning
confidence: 99%
“…Finally, 559 patients were included in this study. The pathological types included differentiated non-keratinizing carcinoma (World Health Organization [WHO] type II; ICD-O histology codes 8072 and 8073) and undifferentiated non-keratinizing carcinoma (WHO type III; ICD-O histology codes 8020, 8021, and 8082) [ 15 ]. Our eligibility criteria included: M0 stage at the time of diagnosis; achieved complete response (CR) or partial response (PR) after primary treatment; distant lesions occurred after initial treatment; no history of other malignancies; satisfactory liver and kidney function; complete treatment information and histologically confirmed NPC.…”
Section: Methodsmentioning
confidence: 99%