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Obesity

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The Body Mass Index (BMI) is a numerical value derived from a person's weight and height, used to categorize individuals into weight ranges. It is calculated using the formula: weight in kilograms divided by height in meters squared. Obesity is a health condition characterized by excessive accumulation of adipose tissue that poses health risks, often diagnosed with a BMI ≥ 30. This excess fat storage occurs when surplus dietary calories are converted into triglycerides and stored in adipocytes...

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Several factors can increase the risk of cancer in an individual. About 50% of cancer cases can be prevented by adopting a healthy lifestyle, regular exercise, eating healthy, and following a modest cancer prevention diet. Epidemiological studies have consistently shown that populations with vegetable and fruit-rich diets have reduced the incidence of cancer. On the other hand, populations who have a diet rich in animal fat, red meat, junk food, or high calories are predisposed to cancer.
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An Ex Vivo Model of Ovarian Cancer Peritoneal Metastasis Using Human Omentum

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Published on: January 26, 2024

Obesity and cancer.

Kathleen Y Wolin¹, Kenneth Carson, Graham A Colditz

¹Department of Surgery, Washington University School of Medicine, and Siteman Cancer Center, Barnes Jewish Hospital, 660 S Euclid Avenue, St. Louis, Missouri 63110, USA. wolink@wustl.edu

|May 29, 2010

Summary

Obesity contributes to 20% of cancers. Addressing weight and promoting physical activity can prevent cancer and improve outcomes for survivors, enhancing quality of life.

Area of Science:

Oncology
Public Health
Preventive Medicine

Background:

Obesity, weight gain, and excess weight are linked to approximately 20% of all cancer cases.
Specific cancers associated with weight include esophageal, thyroid, colon, renal, liver, melanoma, multiple myeloma, rectum, gallbladder, leukemia, lymphoma, prostate, postmenopausal breast, and endometrial cancers.
Diverse etiological mechanisms underlie the relationship between weight and cancer development.

Purpose of the Study:

To summarize the evidence linking weight, weight gain, and obesity to various cancers.
To explore the impact of weight on cancer outcomes and treatment.
To present guidelines for clinical counseling on weight management and physical activity for cancer prevention and survivorship.

Main Methods:

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Comprehensive review of existing evidence on the association between weight status and cancer incidence and outcomes.

Discussion of potential mechanisms driving these associations.

Presentation of a clinical counseling model (The "Five A's") for weight management and physical activity interventions.

Main Results:

Weight loss, especially in postmenopausal women, is associated with reduced breast cancer risk.
While evidence on obesity and outcomes for many cancers is mixed, physical activity shows benefits for breast and colon cancers.
Obesity can impact chemotherapy and radiation therapy dosing and increase treatment-related toxicity.

Conclusions:

Weight management and increased physical activity are crucial for cancer prevention and improving quality of life for cancer survivors.
Clinicians should actively counsel patients on weight loss and physical activity using structured models like the "Five A's".
The rising burden of obesity necessitates greater clinical attention for both cancer prevention and post-diagnosis care.