‘Extended resection lowers Lynch-related cancer risk'
colorectal cancer
caused by
Lynch Syndrome
has indicated pathways for ensuring less chances recurrence.
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A cohort from Ahmedabad represented India in the study.
Lynch Syndrome, also known as hereditary nonpolyposis colorectal cancer (HNPCC), is the most common hereditary cancer condition that significantly increases the risk of developing colorectal cancer and other cancers.
The condition often affects multiple generations, and in the Indian context, some studies estimate the prevalence to be one in 300 persons.
More importantly, about 10-15% of colorectal cancers in India are caused by the condition compared to 2-10% in Western countries. The cancer has a high relapse rate of 17-50% in later stages.
The study, '
Metachronous Colorectal Cancer
Risks After Extended or
Segmental Resection
in MLH1, MSH2, and MSH6 Lynch Syndrome: Multicentre Study from the Prospective Lynch Syndrome Database,' was recently published in the British Journal of Surgery (BJS) by Oxford Academic.
One of the authors of the study is Dr Harsh Sheth from FRIGE Institute of Human Genetics, Ahmedabad.
"It is one of the biggest studies in connection with Lynch Syndrome, comprising over 65,000 person-year follow-ups and surgical data of 908 patients. The study started with the question of what is the best surgical approach after the first tumour – should the onco surgeons go for segmental resection or extended colectomy to reduce chances of relapse," said Dr Sheth.
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He added that the study's findings indicate an equal or higher risk of developing metachronous colorectal cancer for those who already have a history. It challenges the earlier notion that screening and resection are enough. "
Extended resection
significantly reduces the risk of metachronous cancer (across all Lynch Syndrome genes) compared to segmental resection. There is no survival benefit in either surgery group, but there are benefits in fewer operative procedures, reduced surveillance burden, and better quality of life," said Dr Sheth.
The take-home message, said experts, for the surgical guidelines is to ensure that if Lynch Syndrome is detected pre-operatively, the chances of metachronous cancer should be discussed.
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