Early onset cancers (EOCs) is a global phenomenon among those born in the 1980s and 1990s with significant increases occurring.
Early onset cancers are defined as malignancies diagnosed in individuals younger than 50 years of age.
This age reflects the age before which most population-based cancer screening programs begin, particularly for cancers such as colorectal and breast cancer.
The sharpest rise in incidence of early onset cancers has occurred among those with gastrointestinal cancers.
This trend is particularly notable for gastrointestinal cancers (e.g., colorectal, pancreatic, and gastric), which have shown the fastest-growing incidence rates among younger adults.
Most early onset G.I. cancers are associated with modifiable risk factors, including: obesity, poor quality diet, with sugar, sweetened beverages, ultra processed foods, sedentary lifestyle, cigarette smoking, and alcohol consumption.
Nonmodifiable risk factors for early onset cancer include family, history, hereditary, syndromes, and inflammatory bowel disease.
Approximately 15 to 30% of early onset G.I. cancers have pathogenic germline variants IN genes such as DNA mismatch repair genes and BRCA 1/2.
Early onset cancers encompass a broad range of tumor types, including but not limited to breast, colorectal, endometrial, stomach, pancreas, liver, kidney, thyroid, head and neck, reproductive organs, and certain hematologic malignancies.
All patients with early onset cancer should undergo Jerline and somatic, genetic testing.
Epidemiologically, the incidence of early onset cancers has been rising globally over the past several decades, in contrast to the declining incidence of cancers in older adults.
EOCs arise sporadically and are associated with significant morbidity and mortality.
EOC‘s may be an example of accelerated biological aging suggesting that a greater incidence of cancers at younger chronological ages, is occurring among biologically older individuals.
Early-onset cancers often have a strong genetic component.
Germline mutations in high-penetrance genes such as BRCA1/2, Lynch syndrome-associated genes, and others significantly increase the risk.
While a subset of early onset cancers is attributable to hereditary cancer predisposition syndromes, the majority are sporadic and likely result from a complex interplay of early-life exposures, lifestyle factors, environmental influences, and possibly alterations in the microbiome.
Unhealthy lifestyle choices, including smoking, alcohol consumption, obesity, physical inactivity, and poor dietary habits, environmental exposures to particulate matter, psychosocial states and stressors with depression, social isolation, financial insecurity, and medication use with antibiotics are significant contributors.
Many exposures hypothesized to cause early onset cancers are the same exposures that accelerate biological aging in the general population.
Aging and cancer share common mechanisms, including shorter, telomere length, and increased DNA damage:Suggesting early onset cancers may be related to biological aging processes driving oncogenesis.
EOC‘s are aligned with other trends, showing an increase in age related conditions and causes of death that young people are typically observed in later life, including heart failure, and stroke.
It is suggested that throughout life, cellular and molecular damage accumulates from a combination of metabolic states, health behaviors, environmental, socioeconomic, and psychosocial exposures and their interactions which can speed up biological aging and lead to the early emergence of age related conditions and diseases, including cancer.
Biological aging, may be the mechanism by which exposure lead to early onset, cancers, and other age related conditions.
Clinically, early onset cancers often present at more advanced stages.
They may have distinct biological and molecular features compared to cancers diagnosed at older ages.
The incidence of cancer among adults under age, 50 years has risen worldwide, despite unchanged hereditary cancer rates a finding that suggests the influence of environmental and lifestyle factors.
Exposure to endocrine disruptors and other environmental toxins during early life may play a role in the development of early-onset cancers.
Conditions such as inflammatory bowel disease (IBD) and metabolic syndrome are linked to higher risks of specific early-onset cancers, such as colorectal cancer.
Alterations in the gut microbiome due to diet, antibiotics, and other factors may contribute to the development of early-onset cancers, particularly in the digestive system.
Treatment Options:
Surgical Intervention:
Chemotherapy and Radiotherapy
Targeted Therapy
Immunotherapy
Genetic Counseling is recommended for all patients with early-onset cancer to guide treatment and preventive strategies.