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Comparison of HR MAS MR spectroscopic profiles of breast cancer tissue with clinical parameters
Author(s) -
Sitter Beathe,
Lundgren Steinar,
Bathen Tone F.,
Halgunset Jostein,
Fjosne Hans E.,
Gribbestad Ingrid S.
Publication year - 2006
Publication title -
nmr in biomedicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.278
H-Index - 114
eISSN - 1099-1492
pISSN - 0952-3480
DOI - 10.1002/nbm.992
Subject(s) - phosphocholine , breast cancer , choline , lymph node , creatine , cancer , pathology , chemistry , in vivo magnetic resonance spectroscopy , medicine , magnetic resonance imaging , phospholipid , biochemistry , radiology , membrane , phosphatidylcholine
Breast cancer is the most frequent form of cancer in women and improved diagnostic methods are desirable. Malignant cells have altered metabolism and metabolic mapping might become a tool in cancer diagnostics. High‐resolution magic angle spinning (HR MAS) MR spectroscopy of tissue biopsies provides detailed information on metabolic composition. The 600 MHz 1 H HR MAS spectra were acquired of breast cancer tissue from 85 patients and adjacent non‐involved tissue from 18 of these patients. Tissue specimens were investigated by microscopy after MR analysis. The resulting spectra were examined by three different approaches. Relative intensities of glycerophosphocholine (GPC), phosphocholine (PC) and choline were compared for cancerous and non‐involved specimens. Eight metabolites, choline, creatine, β‐glucose, GPC, glycine, myo ‐inositol, PC and taurine, were quantified from the recorded spectra and compared with tumor histological type and size, patient's lymph node status and tissue composition of sample. The spectra were also compared with tumor histological type and size, lymph node status and tissue composition of samples using principal component analysis (PCA). Tumor samples could be distinguished from non‐involved samples (82% sensitivity, 100% specificity) based on relative intensities of signals from GPC, PC and choline in 1 H HR MAS spectra. Tissue concentrations of metabolites showed few differences between groups of samples, which can be caused by limitations in the quantification procedure. Choline and glycine concentrations were found to be significantly higher in tumors larger than 2 cm compared with smaller tumors. PCA of MAS spectra from patients with invasive ductal carcinomas indicated a possible prediction of spread to axillary lymph nodes. Metabolite estimates and PCA of MAS spectra were influenced by the percentage of tumor cells in the investigated specimens. Copyright © 2005 John Wiley & Sons, Ltd.