Histogram analysis parameters of dynamic contrast-enhanced magnetic resonance imaging can predict histopathological findings including proliferation potential, cellularity, and nucleic areas in head and neck squamous cell carcinoma
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Alexey Surov1, Hans Jonas Meyer1, Leonard Leifels1, Anne-Kathrin Höhn2, Cindy Richter3 and Karsten Winter3
1Department of Diagnostic and Interventional Radiology, University Hospital of Leipzig, 04103 Leipzig, Germany
2Department of Pathology University Hospital of Leipzig, 04103 Leipzig, Germany
3Institute of Anatomy, University Hospital of Leipzig, 04103 Leipzig, Germany
Alexey Surov, email: Alexey.Surov@medizin.uni-leipzig.de
Keywords: histogram analysis parameters; DCE MRI; proliferation index; cell count; head and neck squamous cell carcinoma
Received: November 03, 2017 Accepted: March 06, 2018 Published: April 20, 2018
Our purpose was to analyze possible associations between histogram analysis parameters of dynamic contrast-enhanced magnetic resonance imaging DCE MRI and histopathological findings like proliferation index, cell count and nucleic areas in head and neck squamous cell carcinoma (HNSCC).
30 patients (mean age 57.0 years) with primary HNSCC were included in the study. In every case, histogram analysis parameters of Ktrans, Ve, and Kep were estimated using a mathlab based software. Tumor proliferation index, cell count, and nucleic areas were estimated on Ki 67 antigen stained specimens. Spearman’s non-parametric rank sum correlation coefficients were calculated between DCE and different histopathological parameters.
KI 67 correlated with Ktrans min (p = –0.386, P = 0.043) and s Ktrans skewness (p = 0.382, P = 0.045), Ve min (p = –0.473, P = 0.011), Ve entropy (p = 0.424, P = 0.025), and Kep entropy (p = 0.464, P = 0.013). Cell count correlated with Ktrans kurtosis (p = 0.40, P = 0.034), Ve entropy (p = 0.475, P = 0.011). Total nucleic area correlated with Ve max (p = 0.386, P = 0.042) and Ve entropy (p = 0.411, P = 0.030).
In G1/2 tumors, only Ktrans entropy correlated well with total (P =0.78, P =0.013) and average nucleic areas (p = 0.655, P = 0.006). In G3 tumors, KI 67 correlated with Ve min (p = –0.552, P = 0.022) and Ve entropy (p = 0.524, P = 0.031). Ve max correlated with total nucleic area (p = 0.483, P = 0.049). Kep max correlated with total area (p = –0.51, P = 0.037), and Kep entropy with KI 67 (p = 0.567, P = 0.018).
We concluded that histogram-based parameters skewness, kurtosis and entropy of Ktrans, Ve, and Kep can be used as markers for proliferation activity, cellularity and nucleic content in HNSCC. Tumor grading influences significantly associations between perfusion and histopathological parameters.
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