Reliability in villous tumors staging between preoperative MRI and histopathological examination
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SPECIAL SECTION: RECTAL CANCER
Reliability in villous tumors staging between preoperative MRI and histopathological examination Céline Vogrig1 · Julie Leclerc2 · Vincent Haghnejad3 · Xavier Orry1 · Thomas Remen4 · Adeline Germain2 · Valérie Laurent1
© Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract Purpose This study aimed to assess the reliability of rectal villous tumors staging between rectal MRI and histological examination used as the Gold Standard and to investigate causes for discrepancies. Methods The rectal 1.5 T MR scans of 40 patients followed for a histologically proven rectal villous adenoma were retrospectively included. Two independent experienced radiologists staged each tumor according to the TNM classification and described the occurrence of retraction of the rectal wall or spiculations within the associated mesorectum. A third radiologist collected tumor’s morphological characteristics. Results Among the 40 villous tumors studied, 25 (63%) were non-invasive and 15 (37%) were invasive. The mean volume of tumors with spiculations and retraction was significantly greater (p
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