A pilot study to determine the diagnostic criteria of spiculated masses for BI-RADS MRI category 5: when to perform re-biopsy after discordant pathologic result?

Background This study aimed to investigate (1) the MRI and clinical findings useful to differentiate malignant from benign spiculated masses and (2) the diagnostic criteria of spiculated masses for BI-RADS MRI category 5, for which any non-malignant biopsy result is considered discordant and a re-biopsy is recommended.