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Fig. 5. MasSpec Pen analysis of an HGSC tissue sample with mixed histologic composition.
MasSpec Pen analysis of an HGSC tissue sample with mixed histologic composition. (A) Optical image shows the tissue sample that was analyzed at the demarcated regions (1 to 5) using a 1.5-mm-diameter MasSpec Pen. After the MasSpec Pen analysis, the tissue sample was frozen, sectioned, and H&E-stained. An optical image of the H&E-stained tissue section obtained at region 3 is shown (inset), presenting a mixed histologic composition including cancer and adjacent normal stroma tissue. (B) The MasSpec Pen negative ion mode mass spectra are shown for regions 1 (normal stroma; average of n = 3 mass spectra), 3 (mixture of normal stroma and cancer; average of n = 3 mass spectra), and 5 (cancer; average of n = 3 mass spectra). (C) Table listing the pathologic diagnosis of the five regions analyzed and the Lasso prediction results. Jialing Zhang et al., Sci Transl Med 2017;9:eaan3968 Published by AAAS
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