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Mammographic breast density can predict risk of lymphedema: JAMA

MedhaBy MedhaPublished On 2020-11-13T15:30:10+05:30  |  Updated On 2020-11-14T15:08:53+05:30
Mammographic breast density can predict risk of lymphedema: JAMA

Ontario, Canada: Mammographic breast density can be used to predict lymphedema risk and provide volumetric estimates for lymphedema severity., suggests a recent study in the journal JAMA Network Open. According to the study, patients with low breast density were at higher risk of severe lymphedema.About 20% of breast cancer patients who undergo axillary lymph node dissection will...

Ontario, Canada: Mammographic breast density can be used to predict lymphedema risk and provide volumetric estimates for lymphedema severity., suggests a recent study in the journal JAMA Network Open. According to the study, patients with low breast density were at higher risk of severe lymphedema.

About 20% of breast cancer patients who undergo axillary lymph node dissection will develop lymphedema. There is a need for robust risk models, to approximately monitor and triage these patients for timely diagnosis and treatment. Considering this, Jennifer Yin Yee Kwan, University of Toronto, Toronto, Ontario, Canada, and colleagues evaluated the prognostic value of mammographic breast density in estimating lymphedema severity.

For the purpose, the researchers collected data from July 16, 2018, to March 3, 2020 from the health records of patients of the Cancer Rehabilitation and Survivorship Program at the Princess Margaret Cancer Centre in Toronto, Ontario, Canada. Participants consisted of women (n=373) who had completed curative treatment for a first diagnosis of breast cancer and who were referred to the program. It also included a sample of patients in the general breast oncology population who were receiving follow-up care at the center during the same period but who were not referred to the program. A sample of of patients in the general breast oncology population who were receiving follow-up care at the center during the same period but who were not referred to the program were also included. 

All patients attended follow-up appointments at the Princess Margaret Cancer Centre from January 1, 2016, to May 1, 2018. The cohort was randomly split 2:1 to group patients into a training cohort and a validation cohort.

Spearman correlation coefficient between measured and predicted volume of lymphedema was calculated. Area under the curve (AUC) values were generated for predicting the occurrence of at least mild lymphedema (volume, >200 mL) and severe lymphedema (volume, >500 mL) at the time of initial lymphedema diagnosis. 

Key findings of the study include:

  • Multivariate linear regression identified 3 patient factors (age, BMI, and mammographic breast density), 1 cancer factor (number of pathological lymph nodes), and 1 treatment factor (axillary lymph node dissection) as independent prognostic variables.
  • In validation testing, Spearman correlation revealed a statistically significant moderate correlation (coefficient, 0.42) between measured volume and predicted volume of lymphedema.
  • The AUC values were 0.72 for predicting the occurrence of mild lymphedema and 0.83 for severe lymphedema.

"The findings of this study suggest that mammographic breast density can be used as a prognostic factor for lymphedema risk and provide volumetric estimates for lymphedema severity," concluded the authors. 

The study, "Development and Validation of a Risk Model for Breast Cancer–Related Lymphedema," is published in the journal JAMA Network Open.

DOI: https://jamanetwork.com/journals/jamanetworkopen/fullarticle/2772800


JAMA lymphedema breast density mammography breast cancer 
Source : JAMA Network Open
Medha
Medha

    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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