Saturated Fatty Acids Linked to Breast Cancer in Postmenopausal Women


Freed
Freed

There is a possible link between the presence of invasive ductal carcinoma and fatty acid fractions in breast adipose tissue for postmenopausal women in whom body mass index (BMI) values are not correlated with the fatty acid fractions, according to new Radiology research.

Melanie Freed, PhD, of New York University School of Medicine, and colleagues acquired multiple-echo 3-D gradient-echo data for 89 women. Spectra were generated and used to estimate fractions of monounsaturated fatty acid (MUFA), polyunsaturated fatty acid (PUFA) and saturated fatty acid (SFA) in the breast adipose tissue.

For postmenopausal women, MUFA was lower and SFA was higher for women with invasive ductal carcinoma than for those with benign tissue. No correlation was found between BMI and fatty acid fractions in breast adipose tissue. In women with benign tissue, postmenopausal women had a higher PUFA and lower SFA than premenopausal women.

“We used a rapid method that can be used to acquire MRI spectra during a standard clinical diagnostic imaging session. This technique enables the direct measurement of fat composition in vivo in breast adipose tissue in large patient populations,” the authors write.

Example analysis for two patient cases
Figure 1. Example analysis for two patient cases: (a, b) a 62-year-old postmenopausal woman with a benign lesion and (c, d) a 67-year-old postmenopausal woman with invasive ductal carcinoma. For each case, an example image (first echo) with user-drawn region of interest (a, c) is shown as well as an example spectrum with the fit shown in red (b, d). The inset provides a zoomed view of lines D, E, and, F, which are used to estimate the fatty acid composition. Ppm = parts per million
Distribution of line widths for all patients. Line widths are the full width at half maximum (FWHM) of the Voigt profile fit to line B in Figure 1. Number = number of patients
Figure 2. Distribution of line widths for all patients. Line widths are the full width at half maximum (FWHM) of the Voigt profile fit to line B in Figure 1. Number = number of patients
Bland-Altman plot of reader agreement for (a) monounsaturated fatty acid, (b) polyunsaturated fatty acid, and (c) saturated fatty acid. Mean and 95 percent limits of agreement are shown.
Figure 3. Bland-Altman plot of reader agreement for (a) monounsaturated fatty acid, (b) polyunsaturated fatty acid, and (c) saturated fatty acid. Mean and 95 percent limits of agreement are shown.

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