Internal separation sign of MRI in diagnosis of fibroadenoma of breast

Abstract：Objective To evaluate the value of internal separation sign of MRI in diagnosis of fibroadenoma of breast .Meth-ods We retrospectively analyzed MRI features of 54 fibroadenoma lesions in 52 patients proved by operation and pathology and the diagnostic value of internal separation sign .Results Internal separation sign could be observed in 37 lesions with a incidence rate of 69%( 37/54 ) , the thickness of 29 lesions were less than 2 cm and 8 lesions were over 2 cm.On T1 weighted images (T1WI) with fat suppression, the internal separation sign could not be observed clearly in all the 37 lesions.T2 weighted images (T2WI) with fat suppression could show the internal separation sign in 33 lesions, while contrasted T1WI showed the internal sep-aration sign in 37 lesions.Conclusion The internal separation sign of MRI is one of the special signs for the diagnosis of fibroad-enoma of breast , and contrasted T 1 WI is the best sequence to show the internal separation sign .