Roundup Acute Lymphoblastic Leukemia Lawsuit Filed Against Monsanto

A product liability lawsuit filed by an Arizona maintenance man alleges that three years of exposure to the weedkiller Roundup caused him to develop acute lymphoblastic leukemia (ALL), indicating that Monsanto failed to adequately disclose the potential cancer risks. 

The complaint (PDF) was filed by Isaac Anchondo in the U.S. District Court for the District of Arizona on September 15, maintaining that he could have avoided the acute lymphoblastic leukemia diagnosis if Monsanto had provided proper warnings and instructions about Roundup.

Anchondo indicates that he was exposed to Roundup from around 2012 through 2015, both while working as a maintenance man in Arizona, as well as using the weedkiller on his own property. Roundup was frequently purchased in its liquid form, and Anchondo indicates that he did not know that exposure to the glyphosate-based weedkiller may be injurious to his health until at least July 2015.

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In September 2015, Anchondo was diagnosed with acute lyphoblastic leukemia, which he directly relates to his use of Roundup.

Usually associated with childhood leukemia, acute lymphoblastic leukemia is a cancer that develops in bone marrow. It can cause bruising, enlarged lymph nodes, bone pain, bleeding gums, and results in frequent infections.

“[Monsanto] had sole access to material facts concerning the nature of the risks associated with its Roundup products as expressly stated within its warnings and labels, and [Monsanto] knew that consumers and users such as [Anchondo] could not have reasonably discovered that the risks expressly included in Roundup warnings and labels were inadequate and inaccurate,” according to the complaint. “Had the warnings and labels for Roundup products accurately and adequately set forth the true risks associated with use of such products… [Anchondo] could have avoided the injuries complained of herein.”

In mid-2015, the World Health Organization’s International Agency for Research on Cancer (IARC) classified glyphosate contained in Roundup as a probable human carcinogen. The move has sparked world-wide concerns about why Monsanto failed to provide warnings and recommend safety precautions for users of Roundup, and sparked the avalanche of recent product liability lawsuits filed in courts nationwide.

Anchondo’s lawsuit joins hundreds of Roundup cancer lawsuits filed by individuals throughout the United States, each raising similar allegations that a non-Hodgkins lymphoma diagnosis may have been avoided if Monsanto had provided adequate warnings.

Given the similar questions of fact and law presented in lawsuits filed throughout the federal court system, the U.S. Judicial Panel on Multidistrict Litigation (JPML) established consolidated pretrial proceedings for all federal Roundup cases in October 2016, centralizing the claims before U.S. District Judge Vince Chhabria in the Northern District of California to reduce duplicative discovery, prevent conflicting rulings and serve the convenience of the parties, witnesses and the courts.

As part of the coordinated MDL proceedings, Judge Chhabria has previously determined that the Roundup litigation will be bifurcated, first addressing general causation about the link between the widely used weedkiller and non-Hodgkins lymphoma, as well as other forms of cancer, before addressing case-specific issues about whether Roundup caused cancer for each individual plaintiff.

Following resolution of any motions to dismiss based on general causation, if a Roundup cancer settlements or another resolution for the litigation is not reached during the first phase of discovery, it is expected that Judge Chhabria will establish a bellwether process, where a small group of cases will be prepared for early trial dates to help gauge how juries may respond to certain evidence and testimony that is likely to be repeated throughout the lawsuits.


  • ZannaOctober 21, 2022 at 6:12 am

    Son has Acute lymphoblastic leukemia he is 5 the apartments we lived in used round up in are yard .

  • SantanaApril 20, 2022 at 9:59 pm

    Thank you for your time and review of this file

  • AngelineDecember 30, 2021 at 3:19 pm

    My son worked on a Christmas tree farm from age 15-18 and he would mix and spray roundup. Sometime he would use premixed roundup. He is now 26 and has been diagnosed with acute lymphoblastic leukaemia. We have absolutely no family history of blood cancers or cancer in general.

  • LannaApril 12, 2021 at 4:24 am

    My son, when he was 6, was diagnosed with Acute Lymphoblastic Leukemia. He was diagnosed not too long after I had our front and backyard grass killed with RoundUp before re-seeding. I will never touch that stuff again and I also ask my neighbors not to use it. My son went through 3.5 years of chemotherapy. Thank God he is alive and doing well now.

  • AnnetteSeptember 3, 2020 at 1:57 am

    Ok my son has a.l.l luekima his father has worked around it and also sprayed it around our home also could round up be the cause of our son who fighting luekmia

  • LionelOctober 2, 2019 at 1:04 am

    I got diagnosed with ALL in November 2015 while I was working in a nursery using roundup for about 5 to 6 months I was wondering if I have a case ?

  • MelissaSeptember 12, 2019 at 5:25 pm

    My Husband was diagnosed with ALL and Philadelphia Chromosome Positive in January 2018 when he was 59 years old. He has worked in the Farm Service for over 30 years. He operated the big sprayers that sprayed round up and other chemicals on fields and used it at home on a regular basis. Do you think we have a case? We live in Illinois

  • JessicaAugust 14, 2019 at 3:32 am

    I was diagnosed with acute lymphoblastic leukemia at age 7 I know family used round up can I still have a case?

  • MichelleJuly 27, 2019 at 4:11 am

    My husband was 34 when he was diagnosed with ALL. He has had symptoms for over 6 years. Could never figure out what was wrong with him. Always got different diagnoses. He was always healthy, never sick. Around that time we had moved to Indiana and worked at an Amazon warehouse. We always lived near corn fields and were always outside. In 2015, we moved to Illinois. We lived right next to a corn fi[Show More]My husband was 34 when he was diagnosed with ALL. He has had symptoms for over 6 years. Could never figure out what was wrong with him. Always got different diagnoses. He was always healthy, never sick. Around that time we had moved to Indiana and worked at an Amazon warehouse. We always lived near corn fields and were always outside. In 2015, we moved to Illinois. We lived right next to a corn field again. And yes we were near the Monsanto plants as well, about 30 miles away. We were outside alot and then suddenly, he got very ill. Constant fever of 104, throwing up, couldn't eat anything... His body was fighting something. So I took him to the ER and they sent him to Springfield Medical to the cancer unit. And surprise surprise, 12 years of marriage poofed before my eyes within a month and a half. His mother used roundup when we lived at her house in FL many many years ago, my gma had it in her shed. He would use it outside sometimes when were in FL the beginning of our relationship. Plus he was always around landscaping when doing screen enclosures. Is this related? Him and I have 3 boys together and that man was the only father my daughter knew. Any suggestions? Is this even a case if he didnt use it constantly and directly?

  • stephenJune 9, 2019 at 5:31 pm

    I got A.L.L. in 2012, dang near killed me, I used round up around my house alot to control weeds, plus the farmers around me used it all the time too, I was 51 when I got diagnosed with it, came out of the blue. spent over a month in the hospital plus over another year of treatments. I believe roundup did this to me

  • KarenAugust 11, 2018 at 7:59 am

    My husband developed ALL when he was 27. Doctors told us there was no reason he got sick. We always had some of this around . He fought cancer for 13 years before passing away. Not sure if other people feel this but I feel better knowing something he used made him sick versus the not understanding and wondering for all this time.

  • FrancisOctober 27, 2017 at 3:31 am

    A reply to the above comment. I'm 31 and was diagnosed at 28 with ALL. I worked in the fertilizer department putting away all the chemicals. One question I had was is leukemia a worse form of lymphoma? Or totally different type of cancer?

  • russellOctober 17, 2017 at 1:06 am

    my daughter was diagnosed with ALL Leukemia at age 4. for years I have wondered why or how she could possibly get cancer. I have regularly used Roundup products for weed control etc for years prior to her diagnoses. how would you know if Roundup is the cause to my daughter's years of treatments and continued issues that will last her lifetime.

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