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Cancer tied to elevated risk of Guillain-Barre syndrome: Study

Medha BaranwalWritten by Medha Baranwal Published On 2022-03-10T09:00:04+05:30  |  Updated On 2022-03-10T09:00:31+05:30
Cancer tied to elevated risk of Guillain-Barre syndrome: Study
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Denmark: A recent study in the journal Neurology has revealed that people with certain cancer types may be at increased risk of developing Guillain-Barré syndrome (GBS). The findings of the study suggest the presence of some unidentified factors in several types of cancer that drives this association. GBS is a rare disorder that often begins in the lower extremities and ascends over...

Denmark: A recent study in the journal Neurology has revealed that people with certain cancer types may be at increased risk of developing Guillain-Barré syndrome (GBS). The findings of the study suggest the presence of some unidentified factors in several types of cancer that drives this association. 

GBS is a rare disorder that often begins in the lower extremities and ascends over time with the loss of reflexes that causes muscle weakness or even paralysis in most severe cases. Some cases start a few days or weeks following a respiratory or gastrointestinal viral infection. Often, GBS is reversible. Cancer is shown to increase the risk of GBS development due to molecular mimicry or immunosuppression, but the exact relationship is not clear. 

Against the above background, Lotte Sahin Levison, Department of Neurology, Aarhus University Hospital, Aarhus, Denmark, and colleagues aimed to determine the association between incident cancer and the following risk of GBS development in a nationwide population-based case-control study. 

The study included all patients with first-time hospital-diagnosed GBS in Denmark between 1987 and 2016 and 10 age, sex, and index date-matched population controls per case. Incident cancer diagnoses were identified between six months prior to and two months after the GBS index date. Conditional logistic regression was used to compute ORs as a measure of relative risk and performed stratified analyses to assess the impact of cancer on GBS risk in strata of calendar periods, sex, and age.

In sensitivity analyses, the researchers examined incident cancers in both a broader exposure window (one year before to three months after GBS index date) and a narrower window (six months to one month before the GBS index date) to assess any potential risk of survival bias induced by including cancer diagnoses potentially made after GBS diagnosis. 

Based on the study, the researchers found the following:

  • Of the 2,414 patients with GBS and 23,909 controls included, 49 cases (2.0%) and 138 controls (0.6%) had a recent cancer diagnosis, respectively, yielding a matched odds ratio (OR) of 3.6 for GBS associated with cancer.
  • Stratification by calendar time, gender, and age showed robust results for the association between cancer and GBS, with no major variations.
  • Broadening and narrowing the exposure window produced slightly weakened associations of OR, 2.4 and OR, 2.5, respectively.
  • The GBS ORs were highest for cancers of the lymphatic and hematopoietic tissue (OR, 7.2), respiratory tract (OR, 5.6), prostate and other male genital organs (OR, 5.0), and breast cancer (OR, 5.0).

"While our study suggests that people with cancer have a greater risk of developing Guillain-Barré syndrome, it is important that people with cancer know the overall risk of developing Guillain-Barré is still very small," said Levison in a press release.

"In this study, incident cancer was associated with a markedly increased risk of subsequent GBS development," wrote the authors. "The results suggest that yet unidentified factors present in several types of cancer drive this association." 

Reference:

Association Between Incident Cancer and Guillain-Barré Syndrome Development: A Nationwide Case-Control Study Lotte Sahin Levison, Reimar Wernich Thomsen, Søren Hein Sindrup, Henning Andersen Neurology Mar 2022, 10.1212/WNL.0000000000200015; DOI: 10.1212/WNL.0000000000200015

KEYWORDS: cancer, Guillain-Barré syndrome, GBS, Neurology journal, American Academy of Neurology, Lotte Sahin Levison, incident cancer, lymphatic,hematopoietic tissue, prostate,respiratory tract, breast

cancer Guillain-Barré syndrome Neurology journal 
Source : Neurology journal
Medha Baranwal
Medha Baranwal

    Medha, MSc. Biotechnology

    Medha Baranwal joined Medical Dialogues as an Editor in 2018 for Speciality Medical Dialogues. She covers several medical specialties including Cardiac Sciences, Dentistry, Diabetes and Endo, Diagnostics, ENT, Gastroenterology, Neurosciences, and Radiology. She has completed her Bachelors in Biomedical Sciences from DU and then pursued Masters in Biotechnology from Amity University. She has a working experience of 5 years in the field of medical research writing, scientific writing, content writing, and content management. She can be contacted at  editorial@medicaldialogues.in. Contact no. 011-43720751

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