MP14-17 IMMEDIATE REPEAT BIOPSY IS NOT NECESSARY IN PATIENTS WITH ATYPICAL SMALL ACINAR PROLIFERATION (ASAP): A MULTI-INSTITUTIONAL REVIEW

larger. Analysis for predictors of a lesion becoming RBþ demonstrated that any lesion growth on MRI was a significantly associated with a lesion being RBþ (p1⁄40.012, odds ratio 1⁄4 4.8, 95% CI [1.5, 15.4]). Initial MRI suspicion score, upgrading of MRI suspicion score, initial lesion size < 0.7 cm, and MRI parameters were not significantly associated. CONCLUSIONS: Targeted biopsy negative lesions almost always were benign on serial biopsy. When a lesion was RBþ the vast majority demonstrated low risk disease. Biopsy negative lesions should be re-sampled if they increase in size at an interval of 2 years.