Second Look Us of Non-Mass Enhancing Lesions on MRI


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Yıldız I., Taşkın F. , Tunçbilek N., Kurt N., Esen G., Arıbal M. E.

RSNA, Illinois, Amerika Birleşik Devletleri, 29 Kasım - 04 Aralık 2020, no.20006294, ss.1

  • Basıldığı Şehir: Illinois
  • Basıldığı Ülke: Amerika Birleşik Devletleri
  • Sayfa Sayıları: ss.1

Özet

PURPOSE
To investigate the effectiveness of second look ultrasonography in evaluation of nonmass enhancing lesions detected with MRI. 
 
METHOD AND MATERIALS
Between 2016 and 2019, a total of 349 second look US examinations were performed for the evaluation of MRI detected NME lesions in three centers. Imaging findings, histopathology or follow-up results were recorded retrospectively. We compared the rate of cancer between the lesions with and without sonographic correlation using the Fischer’s exact test. 
 
RESULTS
Sonography correlation was present in 150 (43%) of 349 lesions in 349 women. Sonographic findings were hypoechoic non-mass lesions (47.3%), ductal lesions (41.3%) and masses (11.3%). A total of 184 imaging-guided biopsies were performed. Diagnosis of lesions was based on biopsy or 2-years follow-up. Of the 150 correlated lesions 66 (44%) were diagnosed as malignant. Of the 199 non-correlated lesions 42 (21%) were diagnosed as malignant. There was a strong relation between sonographic correlation and malignant diagnosis (p=0.000). Of the SLUS undetected NME lesions; 36% of segmental, 24% of linear, and 24% of focal NME lesions were diagnosed malignant. 
 
CONCLUSION
SLUS correlated lesions tend to show higher rates of malignancy compared to SLUS undetected NMEs. Second look US is helpful in evaluating MRI detected NME lesions and decreases the MR guided biopsy rate by 43%. Although more than half of NME lesions cannot be detected with SLUS, sonographic correlation can be an important criterion for biopsy decision. 
 
CLINICAL RELEVANCE/APPLICATION
Second look US is helpful in evaluating MRI detected NME lesions and decreases the MR guided biopsy rate by 43%.