Human Papillomavirus Genotype-Specific Persistence and Potential Risk Factors among Korean Women: Results from a 2-Year Follow-up Study / Journal of the Korean Cancer Association, 대한암학회지

PURPOSE: High-risk human papillomavirus (HPV) infection progression should be considered a critical factor for preventing cervical cancer, although most infections are transient and rarely persist. This study aimed to examine the specific types of HPV infections, their change patterns, and the potential risk factors among Korean women. MATERIALS AND METHODS: We included 4,588 women who visited hospitals in Busan and Suwon for cervical cancer screening, and 1,224 of thesewomen attended a 2-yearfollow-up. Infection statuswas evaluated using HPV DNA testing (Hybrid Capture 2) and genotyping testing (Linear Array). Data regarding the potential risk factors for HPV infection were collected by trained nurses using structured questionnaires. RESULTS: Among the 1,224 women (mean age, 47 years), 105 women (8.6%) were HPV-positive at baseline. HPV infections had been cleared among 92 women (87.6%) within 2 years. Only 13 infections (12.4%) were remained, and the 10 cases of them are high-risk HPV types including genotype 33, 45, 16, 35, and 52. Among women who were negative at baseline, the HPV incidence was 4.8%. The HPV incidence was marginally associated with having multiple sexual partners (odds ratio, 2.0; 95% confidence interval, 1.0 to 3.9), although it was not significantly associated with HPV persistence. CONCLUSION: Most HPV infections (88%) among Korean women were cleared within 2 years, with only a small number of persistent infections. The persistent HPV genotypes were different in our study, compared to those from previous studies. Having multiple sexual partners was associated with acquiring a HPV infection, but not with persistence.

Nationwide statistical analysis of myeloid malignancies in Korea: incidence and survival rate from 1999 to 2012

BACKGROUND: Large-scale epidemiologic analysis for hematologic malignancies will be helpful to understand the trends in incidence and survival. METHODS: The Korea Central Cancer Registry (KCCR) updated the nationwide analysis on the incidence and survival of myeloid malignancies, from the Korean National Cancer Incidence Database between 1999 and 2012. Myeloid malignancies were classified based on the International Classification of Diseases for Oncology 3rd edition (ICD-O-3). RESULTS: Overall 3,771 cases of myeloid diseases, which was 1.7% of all cancers, were identified in 2012. The highest incidence of myeloid malignancies was observed in age 70s and male predominance was noted (1.3:1). Acute myeloid leukemia (AML) was the most frequent subtype, followed by myeloproliferative neoplasms (MPN), myelodysplastic syndrome (MDS) and MDS/MPN: age-standardized incidence rates (ASR) in 2012 for each disease were 2.02, 1.95, 1.13, and 0.12 per 100,000 persons, respectively. The ASR for all myeloid malignancies was increased from 3.31 in 1999 to 5.70 in 2012 with the annual percentage change (APC) of 5.4 %. Five-year relative survival rate (RS) for myeloid malignancies has gradually improved for decades. RS changed from 26.3% to 34.8% in AML, specifically from 51.6% to 69.6% in acute promyelocytic leukemia (APL) and from 23.8% to 29.9% in non-APL AML, between 1996-2000 and 2008-2012. RS also increased from 81.8% to 87.1% in MPN, with a significant improvement in CML (from 74.5% to 85.5%), and from 27.3% to 31.7% in MDS/MPN between 2001-2005 and 2008-2012. However, there was no survival improvement in MDS during the study period (45.6% in 2001-2005 to 44.4% in 2008-2012). CONCLUSION: This report updated the nationwide statistical analysis on myeloid malignancies since 2008, showing increasing incidence and improving trends in survival.