Friday, October 17, 2025
The Latest Medical News
A Summary of The Latest Medical News: ## New Swedish Study: Low-Dose Aspirin Halves Risk of Colorectal Cancer Recurrence in Genetically Predisposed Patients
A groundbreaking Swedish-led clinical trial has revealed that a daily low-dose aspirin may dramatically reduce the risk of colorectal cancer recurrence in patients with a specific genetic mutation—offering new hope for those at highest risk for the disease returning after surgery[6].
## The ALASCCA Trial: Precision Medicine in Action
The ALASCCA trial, conducted at Karolinska Institutet and Karolinska University Hospital, represents one of the first randomized, controlled studies specifically designed to test aspirin as a targeted, precision medicine for colorectal cancer[6]. Over 3,500 patients with stage I–III colon or rectal cancer from 33 hospitals in Sweden, Norway, Denmark, and Finland were screened. Those whose tumors harbored alterations in the PIK3 signaling pathway—a mutation present in about 40% of cases—were randomized to receive either 160 mg aspirin daily or a placebo for three years after surgery[1][6].
## Dramatic Reduction in Cancer Recurrence
For patients with the relevant genetic mutation, aspirin reduced the risk of cancer recurrence by 55% compared to placebo[6]. The 3-year cumulative incidence of recurrence was 7.7% for the aspirin group versus 14.1% for the placebo group among those with “group A” (hotspot) mutations, and similar benefits were seen in those with other significant PI3K pathway alterations[1]. Disease-free survival rates were also significantly improved, with aspirin recipients showing 88.5% survival versus 81.4% for placebo in the primary subgroup[1].
## Why Does Aspirin Work in This Subgroup?
The exact mechanisms remain under study, but researchers believe aspirin’s anti-inflammatory properties, ability to inhibit platelet function, and direct effects on tumor growth collectively create a less favorable environment for cancer cells[6]. The trial’s success suggests that aspirin may be most effective in genetically defined subgroups—a major step toward personalized cancer care[6].
## Global Impact and Accessibility
The study’s findings could influence treatment guidelines worldwide, especially because aspirin is inexpensive, widely available, and generally well tolerated[6]. Senior author Anna Martling, professor at Karolinska Institutet and senior consultant surgeon at Karolinska University Hospital, highlights the drug’s potential to “save both resources and suffering” by offering a simple, globally accessible intervention for high-risk patients[6].
## What Does This Mean for Patients and Doctors?
For the first time, robust clinical trial data supports low-dose aspirin as a targeted therapy for preventing recurrence in colorectal cancer patients with PIK3CA or related genetic mutations[1][6]. While not all patients will benefit, those with the identified mutations could see a significant reduction in risk—potentially changing the standard of care for this large subgroup.
## What’s Next in Research?
Future studies may further refine which patients benefit most, explore optimal dosing, and investigate aspirin’s role in other cancers with similar genetic profiles[1]. For now, the message is clear: genetic testing for colorectal cancer is more important than ever, and aspirin emerges as a powerful, cost-effective tool in the fight against recurrence for those with the right molecular signature.
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**In summary:**
Low-dose aspirin has been shown, in a new Swedish clinical trial, to halve the risk of colorectal cancer recurrence in patients with specific genetic mutations in the tumor—offering a new, affordable, and personalized option for preventing this deadly disease from coming back[1][6].
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