Objective:

To observe the imaging features of encapsulated papillary carcinoma (EPC).

Methods:

Imaging results of 13 women with EPC were retrospectively analyzed. Eleven patients underwent mammography

ultrasound and MRI examinations

and 2 young cases were examined by mammography and ultrasound.

Results:

Nine lesions were located behind the areola

and 4 in peripheral. Eleven lesions diameter 2 cm

and 2 2 cm. X-ray showed 12 cases with single lesion

and 1 negative. Color Doppler flo

w imaging (CDFI) showed blood flow signals in 13 lesions

and arterial spectrum appeared in 10 lesions. The timeintensity curve (TIC) appeared as type III in 7 cases and type II in 4 cases. Diffusion weighted imaging (DWI) showed high signal in 3 cases

slightly high signal in 8 cases. Apparent diffusion coefficient (ADC) value in 9 case was 1.3110

-3

mm

2

/s

and in 2 cases 1.3110

-3

mm

2

/s. All EPC lesions belonged to Luminal A.

Conclusion:

It is difficult for mammography to find the specific signs of EPC. The appearance of arterial Doppler spectrum indicates the possibility of malignancy. Breast MRI shows great advantages in finding of EPC

especially the TIC pattern and ADC value 1.3110

-3

mm

2

/s

which are correlated with the pathological findings.