Epidemiology of anal canal cancer

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Monday, October 15, 2018
Anal cancer is a cancer that affects the tissues of the anus. Most anal cancers are squamous cell cancers. Squamous cells are a type of cell that line the surface of the anal canal. Rarer types of anal cancer include basal cell carcinoma, melanoma and adenocarcinoma of the anus, a cancer of the cells that make the mucus that helps the stools faeces move smoothly out of the anus. In , Australians were diagnosed with anal cancer. It is a rare cancer, more commonly diagnosed in people aged 50 to 60 years.
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Anal Cancer: An Overview

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The epidemiology of anal cancer.

Although a rare disease, anal cancer is increasingly being diagnosed in patients with risk factors, mainly anal infection with the human papilloma virus. Magnetic resonance imaging MRI with external phased-array coils is recommended as the imaging modality of choice to grade anal cancers and to evaluate the response assessment after chemoradiotherapy, with a high contrast and good anatomic resolution of the anal canal. MRI provides a performant evaluation of size, extent and signal characteristics of the anal tumor before and after treatment, as well as lymph node involvement and extension to the adjacent organs. MRI is also particularly helpful in the assessment of complications after treatment, and in the diagnosis for relapse of the diseases.
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Anal Cancer: An Overview

Anal cancer is a cancer which arises from the anus , the distal opening of the gastrointestinal tract. Prevention includes avoiding risk factors and HPV vaccination. Symptoms of anal cancer can include pain or pressure in the anus or rectum, a change in bowel habits, a lump near the anus, rectal bleeding, itching or discharge.
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Previous studies have reported that anal cancer incidence has increased in individual countries; however, age-specific trends were not examined in detail. The standardised rate ratios SRRs for — vs — and the 5-year average percent change AvPC during the period were used to assess changes in the age-standardised incidence rates. These competing trends still resulted in significant increases in the overall incidence of anal cancer in men and women of all ages groups with significant increasing trend.
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