Skin cancers are cancers that arise from the skin. They are due to the development of abnormal cells that have the ability to invade or spread to other parts of the body. Skin cancer is the most commonly diagnosed form of cancer in humans. There are three main types of skin cancers: basal-cell skin cancer (BCC), squamous-cell skin cancer (SCC) and melanoma. The first two, along with a number of less common skin cancers, are known as nonmelanoma skin cancer (NMSC). Basal-cell cancer grows slowly and can damage the tissue around it but is unlikely to spread to distant areas or result in death. It often appears as a painless raised area of skin that may be shiny with small blood vessels running over it or may present as a raised area with an ulcer. Squamous-cell skin cancer is more likely to spread. It usually presents as a hard lump with a scaly top but may also form an ulcer. Melanomas are the most aggressive. Signs include a mole that has changed in size, shape, color, has irregular edges, has more than one color, is itchy or bleeds.
Mortality rate, or death rate, is a measure of the number of deaths in a particular population, scaled to the size of that population, per unit of time. Mortality rate is typically expressed in units of deaths per 1,000 individuals per year; thus, a mortality rate of 9.5 in a population of 1,000 would mean 9.5 deaths per year in that entire population, or 0.95% out of the total. It is distinct from "morbidity", which is either the prevalence or incidence of a disease, and also from the incidence rate.
Indoor tanning involves using a device that emits ultraviolet radiation to produce a cosmetic tan. Typically found in tanning salons, gyms, spas, hotels, and sporting facilities, and less often in private residences, the most common device is a horizontal tanning bed, also known as a sunbed or solarium. Vertical devices are known as tanning booths or stand-up sunbeds.
Melanoma is the most dangerous type of skin cancer; it develops from the melanin-producing cells known as melanocytes. It typically occurs in the skin, but may rarely occur in the mouth, intestines, or eye. In women, melanomas most commonly occur on the legs; while in men, on the back. Melanoma is frequently referred to as malignant melanoma. However, the medical community stresses that there is no such thing as a 'benign melanoma' and recommends that the term 'malignant melanoma' should be avoided as redundant.
Diseases of affluence, previously called diseases of rich people, is a term sometimes given to selected diseases and other health conditions which are commonly thought to be a result of increasing wealth in a society. Also referred to as the "Western disease" paradigm, these diseases are in contrast to "diseases of poverty", which largely result from and contribute to human impoverishment. These diseases of affluence have vastly increased in prevalence since the end of World War II.
Crime has been recorded in the United States since its founding and has fluctuated significantly over time. Most available data underestimate crime before the 1930s, giving the false impression that crime was low in the early 1900s and had a sharp rise after. Instead, violent crime during the colonial period was likely three times higher than the highest modern rates in the data we have, and crime had been on the decline since colonial times. Within the better data for crime reporting and recording available starting in the 1930s, crime reached its broad, bulging modern peak between the 1970s and early 1990s. After 1992, crime rates have generally trended downwards each year, with the exceptions of a slight increase in property crimes in 2001 and increases in violent crimes in 2005–2006, 2014–2016 and 2020–2021.
Pakistan is the fifth most populous country in the world with population approaching 225 million. It is a developing country struggling in many domains due to which the health system has suffered a lot. As a result of that, Pakistan is ranked 122nd out of 190 countries in the World Health Organization performance report.
Australia is a high income country, and this is reflected in the good status of health of the population overall. In 2011, Australia ranked 2nd on the United Nations Development Programme's Human Development Index, indicating the level of development of a country. Despite the overall good status of health, the disparities occurring in the Australian healthcare system are a problem. The poor and those living in remote areas as well as indigenous people are, in general, less healthy than others in the population, and programs have been implemented to decrease this gap. These include increased outreach to the indigenous communities and government subsidies to provide services for people in remote or rural areas.
The Tajikistan health system is influenced by the former Soviet legacy. It is ranked as the poorest country within the WHO European region, including the lowest total health expenditure per capita. Tajikistan is ranked 129th as Human Development Index of 188 countries, with an Index of 0.627 in 2016. In 2016, the SDG Index value was 56. In Tajikistan health indicators such as infant and maternal mortality rates are among the highest of the former Soviet republics. In the post-Soviet era, life expectancy has decreased because of poor nutrition, polluted water supplies, and increased incidence of cholera, malaria, tuberculosis, and typhoid. Because the health care system has deteriorated badly and receives insufficient funding and because sanitation and water supply systems are in declining condition, Tajikistan has a high risk of epidemic disease.
Health in Israel is generally considered good.
The epidemiology of cancer is the study of the factors affecting cancer, as a way to infer possible trends and causes. The study of cancer epidemiology uses epidemiological methods to find the cause of cancer and to identify and develop improved treatments.
A Spitz nevus is a benign skin lesion. A type of melanocytic nevus, it affects the epidermis and dermis.
Worldwide, breast cancer is the most common invasive cancer in women. Breast cancer comprises 22.9% of invasive cancers in women and 16% of all female cancers.
Zambia is a landlocked country in Sub Saharan Africa which experiences a burden of both communicable and non-communicable diseases. In line with WHO agenda for equity in health, it has adopted the Universal Health Coverage agenda to mitigate the challenges faced within the health sector. The Ministry of Health (MOH) provides information pertaining to Zambian health. The main focus of the Ministry of Health has been provision of uninterrupted care with emphasis on health systems strengthening and services via the primary health care approach.
Brunei's healthcare system is managed by the Brunei Ministry of Health and funded by the General Treasury. It consists of around 15 health centers, ten clinics and 22 maternal facilities, considered to be of reasonable standard. There are also two private hospitals. Cardiovascular disease, cancer, and diabetes are the leading cause of death in the country, with life expectancy around 75 years, a vast improvement from 1961. Brunei's human development index (HCI) improved from 0.81 in 2002 to 0.83 in 2021, expanding at an average annual rate of 0.14%. According to the UN's Human Development Report 2020, the HCI for girls in the country is greater than for boys, though aren't enough statistics in Brunei to break down HCI by socioeconomic classes. Brunei is the second country in Southeast Asia after Singapore to be rated 47th out of 189 nations on the UN HDI 2019 and has maintained its position in the Very High Human Development category. Being a culturally taboo subject, the rate of suicide has not been investigated.
Exposure to ionizing radiation is known to increase the future incidence of cancer, particularly leukemia. The mechanism by which this occurs is well understood, but quantitative models predicting the level of risk remain controversial. The most widely accepted model posits that the incidence of cancers due to ionizing radiation increases linearly with effective radiation dose at a rate of 5.5% per sievert; if correct, natural background radiation is the most hazardous source of radiation to general public health, followed by medical imaging as a close second. Additionally, the vast majority of non-invasive cancers are non-melanoma skin cancers caused by ultraviolet radiation. Non-ionizing radio frequency radiation from mobile phones, electric power transmission, and other similar sources have been investigated as a possible carcinogen by the WHO's International Agency for Research on Cancer, but to date, no evidence of this has been observed.
Skin cancer in Australia kills over 2,000 each year, with more than 750,000 diagnosed and treated. Tanning became embedded in Australian culture and proved to be a controversial issue because of its popularity among teens and solarium users, despite correlations between tanning and an increased risk of developing melanoma. Australia experienced relative success through skin cancer prevention campaigns started in the 1980s and continued to invest and promote awareness through government-funded mass media strategies. Although Australia has one of the highest national rates of skin cancer, mortality trends in melanoma stabilized.
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