Phyllodes tumor of the breast: Correlation between MR findings and histologic grade

Hidetake Yabuuchi, Hiroyasu Soeda, Yoshio Matsuo, Takashi Okafuji, Takashi Eguchi, Shuji Sakai, Syoji Kuroki, Eriko Tokunaga, Shinji Ohno, Kenichi Nishiyama, Masamitsu Hatakenaka, Hiroshi Honda

研究成果: ジャーナルへの寄稿学術誌査読

97 被引用数 (Scopus)

抄録

Purpose: To retrospectively evaluate the magnetic resonance (MR) imaging findings of phyllodes tumor of the breast and to compare these findings with the histologic grade. Materials and Methods: Institutional review board approval and informed consent were obtained. The authors reviewed the MR findings in 30 female patients aged 16-73 years (mean, 40.2 years) with surgically confirmed phyllodes tumors. Analyzed MR findings included tumor shape, margin, internal enhancement, and size; signal intensity (SI) of tumor higher than that of normal breast tissue on T1-weighted images; SI of tumor lower than or equal to that of normal tissue on T2-weighted images; cyst wall appearance; kinetic curve assessment; and apparent diffusion coefficient (ADC). The MR findings and histologic grade were statistically analyzed to determine whether any correlations existed. Significant MR findings were compared with histopathologic findings. Results: Nineteen benign, six intermediate (characterized by five to nine cell reproductions at 10 high-power fields, pushing or infiltrative margins, moderate stromal cellularity, and atypia and overgrowth), and five malignant phyllodes tumors were assessed. Irregular cyst wall (P = .003), tumor SI lower than or equal to normal tissue SI on T2-weighted images (P = .005), and low ADC (P = .001) correlated significantly with histologic grade. Tumor SI higher than normal tissue SI on T1-weighted images was more frequent in the malignant (in three of five tumors) and intermediate (in three of six tumors) groups than in the benign group (in two of 19 tumors); however, it was not a significant finding (P = .024). Tumor SI higher than normal tissue SI on T1-weighted images and irregular cyst wall corresponded histopathologically to hemorrhagic infarction and necrosis, respectively. Tumor SI lower than or equal to normal tissue SI on T2-weighted images and low ADC corresponded histopathologically to stromal hypercellularity. Other findings were not significant. Conclusion: Several MR findings can be used to help determine the histologic grade of phyllodes breast tumors.

本文言語英語
ページ(範囲)702-709
ページ数8
ジャーナルRadiology
241
3
DOI
出版ステータス出版済み - 12月 1 2006

!!!All Science Journal Classification (ASJC) codes

  • 放射線学、核医学およびイメージング

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