The impact of breast carcinoma and genital tract malignancy on the physical and mental health, especially reproductive function, of women aged 15-39 years in the adolescent and young adult (AYA) group is significant. This research aims to analyze the burden of AYA female cancer in various regions and countries globally from 1990 to 2021. Epidemiological data were sourced from the Global Burden of Disease (GBD) study 2021. The study analyzed data on female cancers (breast, ovarian, uterine, and cervical) to assess disease burden across different ages, years, and locations, encompassing 21 GBD regions, 195 countries, and five sociodemographic index (SDI) regions. In 2021, AYA female cancer saw 383 241 new cases and 81 679 deaths globally, with 2 975 183 prevalent cases and 4 855 780 disability-adjusted life years. In 2021, Central Latin America recorded the highest age-standardized incidence (ASIR) and prevalence rates (ASPR), whereas South sub-Saharan Africa had the highest age-standardized mortality (ASMR) and disability rates (ASDR). Nations with high SDI typically exhibited elevated ASIR and ASPR, whereas ASMR and ASDR demonstrated inverse patterns. Over the past three decades, ASIR and ASPR of female cancers among AYA women have increased globally. In contrast, the ASMR and ASDR have demonstrated a declining trend. Notably, breast cancer emerged as the most prevalent malignancy among AYA women. Over the past three decades, the ASIR and ASPR of AYA female cancers have consistently increased, significantly burdening this demographic. Additionally, pronounced disparities are evident across different regions and countries, with AYA women in low SDI environments experiencing poorer prognoses compared to their counterparts in high SDI environments. Consequently, it is imperative to enhance interregional collaboration and communication to optimize the overall prognosis of AYA female cancers.

Background: This study analyzed global trends in incidence, mortality, disability-adjusted life years (DALYs), and economic burden of tracheal, bronchus, and lung (TBL) cancer from 1990 to 2021, focusing on regional and sex differences, with projections to 2050. Methods: Using joinpoint regression to assess temporal trends. Decomposition analysis quantified the effects of population growth, aging, and changes in disease fatality. Health inequalities were evaluated using the concentration index (CI), and the economic burden was estimated through a value of statistical life (VSL). Results: Globally, TBL cancer deaths increased from 1.08 million in 1990 to 2.02 million in 2021, and DALYs rose from 28.46 million to 46.54 million, with a sharper rise among females. Population growth (94.18%) and population aging (36.07%) were the major components to the observed increase in the global TBL cancer burden. East Asia accounted for over half of the global increase, with China contributing the largest national share. The global economic burden is projected to rise from $3.86 trillion in 2021 to $7.15 trillion by 2050. China's economic loss from TBL cancer is estimated to increase from $688 billion in 2021 to $2.49 trillion by 2050, surpassing the United States and reflecting the rapid escalation of burden in Asia. Conclusion: TBL cancer remains a major global health challenge, requiring urgent, region-specific action to reduce its growing impact.

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