Andy Chan

Gastroenterologist/Epidemiologist @MGHMedicine, prof @harvardmed and @HarvardChanSPH, Chief @MGH_CTEU, Director of Epi at @MGHCancerCenter. Tweets my own.

[Andy Chan @AndyChanMD]

1/15

USPSTF2021 recs (overturns milestone USPSTF2016) now drop #colorectalcancer (CRC) prevention as a rationale for taking aspirin

I think they missed the mark

I’ve dug into their evidence synthesis and can expand what I told @nytimes

A thread👇🏽

https://t.co/BGktgl6QWe

[SU2Cscience @SU2Cscience]

Gastric cancer claims more than 750,000 lives each year. In partnership with @CR_UK, we’ve extended funding for a research dream team that has developed a way to find and stop #gastriccancer at its earliest stages, when treatment is most effective: https://t.co/u4q0fvb0zT @LumicellSurg @MassGenBrigham

[Gut Journal @Gut_BMJ]

#GUTImage from the paper by Ma @wenjie_ma2 et al on the paper

"Lifestyle factors, genetic susceptibility and risk of incident diverticulitis: an integrated analysis of four prospective cohort studies and electronic health records-linked biobank" via https://t.co/86P1ItYk1t

@MGH_CTEU @HarvardChanSPH @AndyChanMD #Diverticulitis #GUTAbstract

[Gut Journal @Gut_BMJ]

#GUTImage from the paper by Ma @wenjie_ma2 et al on the paper

"Lifestyle factors, genetic susceptibility and risk of incident diverticulitis: an integrated analysis of four prospective cohort studies and electronic health records-linked biobank" via https://t.co/86P1ItYk1t

@MGH_CTEU @HarvardChanSPH @AndyChanMD #Diverticulitis #GUTAbstract

[Anirban Maitra @Aiims1742]

New @NatureAging paper from @AndyChanMD & colleagues using plasma proteomics data from UKBB & validation cohorts:
Organ-specific proteomic aging clocks predict disease and longevity across diverse populations
https://t.co/rXZkXMYsqV
Particularly striking data on brain aging

[Anirban Maitra @Aiims1742]

New @JAMAOnc study from @AndyChanMD & @CancerGrand Team PROSPECT
Ultraprocessed Food Consumption and Risk of Early-Onset Colorectal Cancer Precursors Among Women
https://t.co/f7DrzYS7GA
The study looked at early onset adenomas (tubular and serrated) in the Nurses’ Health Study.

[Gut Journal @Gut_BMJ]

#GUTImage from the paper by Ma @wenjie_ma2 et al on the paper

"Lifestyle factors, genetic susceptibility and risk of incident diverticulitis: an integrated analysis of four prospective cohort studies and electronic health records-linked biobank" via https://t.co/86P1ItYk1t

@MGH_CTEU @HarvardChanSPH @AndyChanMD #Diverticulitis #GUTAbstract

[Fola May, MD PhD @drfolamay]

Ultra-processed foods linked to increased risk of precancerous colon polyps, study finds.

Great new study by @AndyChanMD and colleagues/team!

https://t.co/W4IR3AzMi9 via @nbcnews

#crc #colorectalcancer

[GIE @GIE_Journal]

Online in GIE’s Articles in Press: "Revisiting the starting age of colorectal cancer screening for the average-risk Asian population: a cost-effectiveness analysis" by Junjie Huang et al. https://t.co/ZdiSGGNAni

#GITwitter

@junjie_cuhk @drwong_martin @AndyChanMD @ClaireCWZhong

[Gut Journal @Gut_BMJ]

Read the #GUTOnline #GUTInTheNews #GUTPressRelease paper by @wenjie_ma2 et al entitled

"Lifestyle factors, genetic susceptibility and risk of incident diverticulitis: an integrated analysis of four prospective cohort studies and electronic health records-linked biobank" via

https://t.co/rDAuKRbTuE

@MGH_CTEU @HarvardChanSPH @AndyChanMD #Diverticulitis

[Thejus Jayakrishnan @ThejusJay]

What Age Is the Best “FIT” for Colorectal Cancer Screening? https://t.co/xwaMVVNjB9

Thankful for the opportunity to write this editorial with @KimmieNgMD and @AndyChanMD @DFarberYoungCRC @MGH_CTEU @DanaFarberNews

[Aasma Shaukat MD MPH @AasmaShaukatMD]

🔥🔥📝 Hot off the Press: Our clinical validation study of a blood test for CRC screening👇🏼👇🏼👇🏼👇🏼
🔵 n=27010
🔵CRC sens 80%, spec 91%
🔵May help those unscreened despite stool test and COL

@nyulangone @NYULH_DeptofMed

https://t.co/xAphIFKSKH

[Mengxi Du @Mengxi_D]

@MingyangSong3 @AndyChanMD @HarvardEpi @HarvardChanSPH @HSPHCancerEpi

[Clinical & Translational Epidemiology Unit - MGH @MGH_CTEU]

How does AI and natural language processing help identify diverticulitis associated features in electronic health records and predict outcomes? Explore the data at @wenjie_ma2’s poster!

@AndyChanMD
@LisaStrateMD
@LiloWuyilun

#AI #NLP #EHR #DiverticularDisease #DDW2025

[Clinical & Translational Epidemiology Unit - MGH @MGH_CTEU]

How does diet shape fecal bile acid profiles and impact colorectal neoplasia risk? Join @wangkaiepi's talk at #DDW2025 to learn more!

@AndyChanMD
@MingyangSong3
@HarvardEpi
@HarvardChanSPH
@HSPHCancerEpi
#Microbiome #BileAcids #CancerPrevention #GutHealth #ColorectalCancer

[Clinical & Translational Epidemiology Unit - MGH @MGH_CTEU]

Does ultra-processed food increase early-onset colorectal neoplasia risk? @PhyllisWhatsUp's study in young women suggests a strong link.
@AndyChanMD
@Mengxi_D

#EOCRC #Nutrition #CancerEpi #DDW2025

[BCM Gastroenterology @bcm_gihep]

It is an honor to have @AndyChanMD as the Graham-Schwartz lecture speaker for our @BCMDeptMedicine and @tmcddc

[Mass General MDs @MassGeneralMDs]

A study co-authored by #MassGeneral physician @AndyChanMD was covered by @WebMD. The study found that eating at least two servings of yogurt a week can help prevent colon cancer.https://t.co/V5zlMFmtWT

[Song Lab @SongLabHarvard]

We're honored to be featured in the Harvard Gazette for our recent journal article on colorectal cancer screening. @MingyangSong3 @AndyChanMD @wangkaiepi @HSPHCancerEpi @HarvardEpi @HarvardChanSPH

Our findings have significant implications for personalized healthcare: Individuals with a clean colonoscopy might extend their screening intervals beyond 10 years, depending on lifestyle risk factors and family history.

This framework helps refocus healthcare resources on those at greater risk—those who've never been screened and disadvantaged groups with traditionally lower screening rates.

We're grateful to the Harvard Gazette for highlighting our efforts. You can read the article here:

https://t.co/HX0XeDMXzh

#HarvardGazette #ColorectalCancer #ResearchHighlight #PublicHealth #Healthcare

[Yale Digestive Diseases @YaleDigestive]

Thank you @AndyChanMD of @MGH_GI for joining us as the Binder lecturer and @YaleIMed #GrandRounds! 2️⃣ talks encompassing the 🔗 between diet & microbiome 🦠 & cancer ➕ aspirin for cancer prevention. Inspiring innovative work! Our faculty & fellows ❤️ed meeting you! 🙏

[Mass General MDs @MassGeneralMDs]

#MassGeneral physician @AndyChanMD was quoted in @newscientist's article on a recent study which projected worldwide cancer deaths to double by 2050. https://t.co/HmeNZavHDo